Environmentalists From The United States

"Morgan's views concerning animal and human interdependence place her among a select group of strong conservationists, of whom the most renowned is probably Rachel Carson ..."

". The power to regrow lost parts permits to survive and even to multiply after injury. Three planarians may live and flourish because one was cut into three pieces. All ns are aquatic. A considerable number live in fresh water and a few on moist soil. Most of them are marine."

"Crickets.—Crickets, like grasshoppers, vary in their winter habits. Some live over the winter in the ; others hibernate as s. Nymphs of the , Gryllus assimilis pennsylvanicus (which has a short ), hibernate beneath stones ..."

"Feeding. The majority of ns are carnivorous. The smaller fresh-water ones feed upon s and worms that are nearly microscopic, the larger one on s, s and , often on their softened remains. Even in quiet waters they can detect juicy meat two or three feet away."

"s are transparent microscopic animals which live in fresh or salt water. They abound in the surface waters of great lakes, and swarm through the shallows of ponds and bogs; there is scarcely any stand of soft water, whether transient puddle or rain-barrel or fountain-basin, where rotifers can not be found. They live in ponds and lakes, providing a large part of the food for small s and worms and are thus indirectly a large source of food for fishes."

"es posses much more beauty and interest than their reputation credits them with. Most of them are marked with concealing colors and patterns, browns, greens, and blacks, picturing upon them the broken shadows and water-soaked leaves of their natural background and hiding them in it. They are sensitive to the slightest vibration of the water, to shadows passing over them, and to small changes in the water around them. Their whole set up is one of exquisite efficiency for their mode of living. … The external features most essential to a leech are the strong muscular suckers at each end of its body and the sucking mouth which which may or may not be armed with jaws … Leeches are segmented worms like bristleworms and common earthworms and belong to the Phylum '."

"... s feed upon microorganism from the muck and water of the bottom and in turn are consumed by es, s and mankind."

"... Darwin ... became the official naturalist on the five-year voyage of the "" (1831–1836) ... ... He also read the essay in which Malthus told of the human populations that became too large for the space available to them (1838). This suggested a plan. Some organism must be winnowed out by their natural surroundings; thus, others would be benefited. There would be natural selection."

"The s () of s repeat the essentials of kidney form and function, tubules closely associated with blood and body fluid, each one a guardian of the content of the blood. There are two kidneys in nearly every segment of the earthworm ..."

"… Wherever animals live, in fresh water, salt water, or on land, their body fluids are similar; all are salty. In marine invertebrates, whether es or s, the body fluids are practically filtered sea water."

"Different waters hold their own special communities; the dainty glen stream shelters companies of in its swift riffles; pond shallows and meadow brooks are the homes of lurking s; and wayside puddles are populous with s and s. In all these places living things must contend with winter cold and summer drought, with storms and flood waters. In winter the pond populations drop to the bottom, frogs and turtles dig under mud and broken plants, s hide under banks to come out with every warm spell, and fresh water sponges are packed in tough covered capsules. In summer when its own pool dries up the flies to some other pond but many burrow into the mud bottom and endure the drought as best they can."

"In most cold winters there is plenty of snow, and this is the greatest aid to wintering insects."

"... The two problems which face every organism are those of maintaining its own life and continuing its race. Its youth is devoted entirely to satisfying its individual needs for food and safety; its adult life is devoted to the race, but the necessities of the individual are still satisfied though they may be secured in an entirely different way. The immature life of is aquatic, and to it all adjustments concerned with food or safety are exclusively confined. The mature or adult life is aerial. It is solely devoted to reproduction. There is no provision for food or for other means of lengthening its life. It gives an opportunity for studying ways of getting a living which have been completely isolated from ways of reproducing."

"At Kartabo the waters of the meet those of the and soon join the great lake-like flowing north through the low lying country of British Guiana until it runs into the sea at . These rivers are hedged in by the jungle whose undergrowth has invaded the border waters in a persistent attempt to gain more territory. roots swing so far out from the banks that fish swim in and out among them. Moccamoccas, the giant s, have grown out still further. Their clublike stems standing in close rank provide on gigantic scale the kind of animal shelter furnished in more modest form by our own and s. Many slow flowing creeks feed into these larger streams but their mouths are hidden by creepers, tangles of mangrove, and prickly shrubs, and if the currents are gentle enough they are choked by lush growths of '. … Even at Kartabo Point the daily tides are insistent reminders of the ocean forty miles away.The low tide lay bare stretches of muck and ooze, silt and silty sand ... the likely dwelling place of the burrowing and crawling Mayflies ..."

"... Although she carried on most of her research in the northeastern United States, she spent the summer of 1926 working in at the Tropical Laboratory in Kartabo. Although limnology was her special subject—on which wrote a useful book, Field Book of Ponds and Streams (1930)—Morgan was also interested in many other facets of zoology, particularly hibernating animals. Her Field Book of Animals in Winter (1939) reflected this interest. In 1949 the ' made it into an educational film. She was also interested in conservation and ecology.."

"Among the s and the water weeds of the shallows, lurk es, s, mud minnows, and young . All of these forage upon snails, crustaceans, and insect larvæ, especially the tempting mayfly nymphs which they find there. s float with their heads just out of water; of all frogs these belong most thoroughly in the pond. Equally at home in it are the painted turtles, and the spotted turtles often found with them … In May and June stumps and floating logs usually carry a load of one kind or the other. They forage in the shallows taking a heavy toll of tadpoles, snails, dragonflies—a miscellaneous bill-of-fare which they always eat under water. Snapping turtles frequent these waters also, catching anything within reach of the lightning-quick thrusts of their heads—fishes, tadpoles, frogs, or crayfishes, as well as the smaller game of insects and worms."

"As the spawning season approaches, fishes move toward the shores of ponds and lakes or upstream in the creeks. Some of them, such as perch and sunfish, only swim in among nearby weeds or protecting stones. The journeys vary from such short ones to the famous migrations of river salmon, extending over hundreds of miles; but they all end at spawning grounds or nesting sites. During this time color differences between male and female appear or become more marked."

"The extension of agricultural and pastoral industry involves an enlargement of the sphere of man's domain, by encroachment upon the forests which once covered the greater part of the earth's surface otherwise adapted to his occupation. The felling of the woods has been attended with momentous consequences to the drainage of the soil, to the external configuration of its surface, and probably, also, to local climate; and the importance of human life as a transforming power is, perhaps, more clearly demonstrable in the influence man has thus exerted upon superficial geography than in any other result of his material effort. Lands won from the woods must be both drained and irrigated; river banks and maritime coasts must be secured by means of artificial bulwarks against inundation by inland and by ocean floods; and the needs of commerce require the improvement of natural, and the construction of artificial, channels of navigation. Thus man is compelled to extend over the unstable waters the empire he had already founded upon the solid land."

"When I was a small child I longed one day to become so famous that I did not have to hide how odd I was—how unlike other people. Few people really held my attention. It was birds and mammals, reptiles and insects that filled my dreams and eternally whetted my curiosity."

"... Things much used inevitably become much worn, and it is one of the most curious phenomena of language, that words are as subject as coin to defacement and abrasion, by brisk circulation. The majority of those who speak any tongue incline to speak it imperfectly; and where all use the dialect of books, the vehicle of the profoundest thoughts, the loftiest images, the most sacred mentions, that the intellect, the fancy, the heart of man has conceived, there special precautions are necessary to prevent that medium from becoming debased and vulgarized by corruptions of form, or, at least by association with depraved beings and unworthy themes. While, therefore, I would open to the humble and the unschooled the freest access to all the rich treasures which English literature embodies, I would inculcate the importance of a careful study of genuine English, and a conscientious scrupulosity in its accurate use, upon all who in any manner occupy the position of teachers or leaders of the American mind, all whose habits, whose tastes, or whose vocations, lead them to speak oftener than to hear."

"If you are aware of the actual nest location, it is best to approach it on a path which would lead past the nest. When you are adjacent to the nest, you should turn at right angles to your path of travel, walk directly to the nest and band the nestlings. Once you have banded the nestlings, retrace your steps to your original line of travel. On the return trip from the nest, sprinkle your trail with liberal quantities of crystals. When you reach your original trail, you should again turn at right angles and continue in your original direction of travel ... Thus any predator who picks up and follows your original trail would be discouraged from turning off and following your side trail to the nest. He would be more likely to continue following your trail in your original direction of travel."

"The general anatomy of the camel is the same as that of other ruminants; but the hump, the horizontal posture of the head, the direction of the eye, the power of closing the nostril, the callosities upon the breast and legs, the spreading and cushioned feet, and above all the curious structure of the stomach, to which he owes his most valuable property, the power of long abstinence from water, distinguish him from all other quadrupeds."

"In those days, we did a good deal of camping in abandoned houses. spent the first night up in this part of the world in a house. We had him sleep in the living room, because the roof didn’t leak there. And we slept in the kitchen, and we had pans put on the end of the bed. And we could hear the water beating in all night, falling into the pans by our feet."

"Fran loved wild birds. She always had an owl flying in her house. She was always rehabilitating eagles and hawks in her barn."

"A long time ago, thousands of prairie chickens lived in Wisconsin. But as cities grew, the prairie chickens lost their nesting grounds. By 1850, the prairie chicken population began to decrease. In the 1950s, only about 2,500 prairie chickens still lived in Wisconsin. But 2 scientists helped to save them. Those scientists were Frances "Fran" and Frederick Hamerstrom."

"Fran was a very influential biologist in Wisconsin. She worked under and was very instrumental in prairie chicken research and habitat preservation. … she flew and hunted with eagles in the 1960s and 1970s, as a woman. … An Eagle to the Sky .. where she chronicled her adventures with several different eagles, was hugely inspiring to me in pursuing that niche of falconry."

"The s mark where they have been and once one has learned to read sign, as woodsmen and professional ornithologists do, one can study food habits. Meat and fishing-eating birds pass conspicuous white urates, commonly called whitewash, and they regurgitate pellets. The splashes of whitewash under a perch suggest that a bird of prey may have used the perch. s, for example, also pass their urates in the form of whitewash, but if the perch is far from a body of water or from a heron rookery, the whitewash was probably passed by a hawk, an owl or a crow. The whitewash of hawks is rather splashy and falls in spatters and streaks. That of owls is far more solid, chalky in texture and tends to form little heaps. Owls tend to gulp their food in big mouthfuls, swallowing many bones—large and small—along with meat. The bones, only slightly digested, persist in the pellets of adults. One can learn a great deal about what owls have eaten by examining the contents of pellets carefully."

"There have long been two strongly divergent poles in our evaluation of ethnobotany. Some students are carried away in an enthusiastic assumption that native peoples everywhere have a special intuition in unlocking the secrets of the Plant Kingdom. Others cast aside or at least denigrate all aboriginal folk lore as not worthy of serious scientific consideration. Both viewpoints, of course, are unwarranted. The accomplishments of native peoples in understanding plant properties so thoroughly must be simply a result of a long and intimate association with their s and their utter dependence on them. Consequently — and especially since so much aboriginal knowledge is based on experimentation — it warrants careful and criticai attention on the part of modern scientific efforts. It behooves us to take advantage now of this extensive knowledge that still exists in many parts of the world, lest it be lost with the inexorable onrush of civilization and the resulting extinction of one primitive culture after another. This experimentally acquired knowledge may not much longer be avaílable."

"has given the world some of its most important plants: the Pará Rubber-tree ('), the Pineapple ('), Cacao ('), the Tapioca Plant or Cassava ('), Coca (' var. ipadu), the Brazil-nut Tree ('), paradise nuts (' spp.), the Curare liana ('), and yet others. Each of these species has local s and wild relatives that may be of inestimable value in future genetic projects that may be oriented towareds various aspects of improving cultivated forms for greater yield, disease resistance, adaptation to different soil and climatic conditions, and sundry other characteristics."

"A very recent survey of natural s has pointed out that more than 200 species of higher plants comprise the study, that they are widely distributed in the plant kingdom (146 genera in more than 50 families) and that the active principles are known for only about 45 species (Schultes and 1980) , Harvard Univ. 28 (186–190). This survey attributes the lack of chemical knowledge of these plants to two causes: (i) the lack of good animal models which the chemist can utilize in monitoring his isolation work; and (ii) the paucity of field work of scientific trustworthiness in fast disappearing aboriginal societies. The survey ends with the statement that the “… Plant kingdom remains a fertile and almost virgin territory for those interested in the discovery of new psychoactive drugs, not to mention other types of biologically active compounds waiting in silent hiding.”"

"An example of how this is the best of times for evolutionary biology is provided by the recent elucidation of a draft sequence of all 3-billion-plus nucleotide pairs in the human genome et al. 2001, et al. 2001). ... Some prognosticators believe that the application of recombinant DNA methods to gene therapy and gene replacement (the repair or replacement of defective genes in the body) soon may lead to a revolution in the history of medicine comparable to the introductions of sanitation, anesthesia, and antibiotics and vaccines. If the new recombinant gene technologies live up to their early billing, we or our children might see a day when gene therapy can alleviate sickle cell anemia, heart disease, cancer, or various other human genetic disorders. Just as we may marvel at our forebears' fortitude in the dark ages before the advent of our modern medicine, our grandchildren may look back with marvel at our fortitude in the era preceding the wide availability of gene therapies. Nonetheless, the technical hurdles remain daunting. … … Ecologists and natural historians are painfully aware that the subject matter of their devotion—biodiversity—is under assault worldwide as the continents fill with people. The collective weight of human activities is leading to the disappearance of wilderness. Atmosphere and oceans are being polluted, marine fisheries are collapsing worldwide, and wetlands and freshwater aquifers have shrunk dramatically. In short, Earth's renewable and nonrenewable resources are being tragically squandered. In the Amazon Basin, for example, which is famous for its rich biota, slash-and-burn fires are so numerous that their light is visible to astronauts in the space shuttle. Some of these astronauts have felt moved to speak in a deeply spiritual tenor about the beauty of the “blue planet” and to bemoan how we are despoiling this special, fragile place."

"Recent genome-sequencing efforts have confirmed that traditional "good-citizen" genes (those that encode functional RNA and protein molecules of obvious benefit to the organism) constitute only a small fraction of the genomic populace in humans and other multicellular creatures. The rest of the DNA sequence includes an astonishing collection of noncoding regions, regulatory modules, deadbeat pseudogenes, legions of repetitive elements, and hosts of oft-shifty, self-interested nomads, renegades, and immigrants. To help visualize functional operations in such intracellular genomic societies and to better encapsulate the evolutionary origins of complex genomes, new and evocative metaphors may be both entertaining and research-stimulating."

"Scientists now routinely utilize the genetic information in biological macromolecules—proteins and DNA—to address numerous aspects of the behaviors, life histories, and evolutionary relationships of organisms. When used to best effect, molecular data are integrated with information from such fields as , , , , and paleontology. These time-honored biological disciplines remain highly active today, but each has been enriched if not rejuvenated by contact with the relatively young but burgeoning field of molecular evolution."

"Phylogeography is a field of study concerned with the principles and processes governing the geographic distribution of genealogical lineages, especially those within and among closely related species. As the word implies, phylogeography deals with historical, phylogenetic components of the spatial distributions of gene lineages. In other words, time and space are the jointly considered axes of phylogeography onto which (ideally) are mapped particular gene genealogies of interest ... The analysis and interpretation of lineage distributions usually require extensive input from molecular genetics, population genetics, ethology, demography, phylogenetic biology, paleontology, geology, and historical geography. Thus, phylogeography is an integrative endeavor that lies at an important crossroads of diverse microevolutionary and macroevolutionary disciplines ..."

"Intelligence is useful and entertaining. Companies go out of their way to hire applicants with high IQ scores, and spectacular intellectual achievements in the arts and sciences can win the hero-worship of generations ([like] Aristotle, Bach, Einstein). Measuring smarts is the job of an industry. Indeed, smartness is so endlessly praised in modern society that questioning its value may constitute one of the most dissident of human acts. High intelligence has been defined in many ways, but typically as the capacity for abstraction, logic, self-awareness, learning, planning, creativity, critical thinking, and problem-solving. High intelligence values itself, selects for itself, and fascinates itself. Our remarkable human intellectual achievements are deeply tied to language, whose development occurred as a self-reinforcing evolutionary feedback process. Hundreds of thousands of years ago, early humans derived a collective survival advantage by developing precursors of language, which enabled them to coordinate their behavior and to plan. But language requires extra brain power, so natural selection also worked to increase brain size, which enabled further development of language, which conferred still more survival advantages, and so on. If evolution produced high intelligence, then high intelligence is latent in evolution. Yet high intelligence is quite rare in nature. While all species communicate to some degree, only one has developed abstract, symbolic language. If language-based high intelligence offers survival advantages, why has it cropped up in nature only once?"

"Climate change is a wicked problem… [and] there is no way to solve it without sacrificing something that society currently holds dear, and without thereby generating more problems. For example, shrinking the economy would reduce carbon emissions, but it would throw a lot of people out of work (in effect, we did trial runs during the financial crash of 2008 and the COVID pandemic of 2020; both times, carbon emissions plunged, yet everyone was eager to “get back to normal”). Building vast amounts of low-carbon energy-producing and energy-using infrastructure would also reduce emissions, but that would require tens of trillions of dollars of investment as well as enormous quantities of depleting, non-renewable minerals—the mining of which would generate pollution and destroy wildlife habitat."

"We’ve spent the last few million years evolving big brains, and we won’t un-evolve them in short order. Further, encouraging dull-wittedness and ignorance would result in terrible short-term consequences (as we Americans are likely to discover during the second Trump presidency). Moreover, intelligence is cool: it gives us art, music, literature, science, mathematics, and so much more. At least some of these achievements and abilities are arguably worth saving. So, what’s our best long-term plan to avert self-destruction, given that intelligence is now baked into our species? There are those who say the solution lies in realizing that we fixate on just one kind of intelligence—linguistic, rational thinking—to the exclusion of others, and that we’d be better served by nurturing multiple intelligences, including musical, interpersonal, intrapersonal, spatial, bodily-kinesthetic, naturalist, and logical-mathematical. That’s good advice as far as it goes. But we’re unlikely to heed it sufficiently until we acknowledge why we came to rely so much on linguistic intelligence in the first place: it gave us power over our environment and over one another. So, our dilemma is as much one of ends (power) as means (language-based intelligence). In addition to needing a counterbalance to linguistic intelligence, we also need a way to check our individual and collective pursuit of excessive power."

"Thank you, Peter, for... this important and timely book. ...I’ve been following your work for several years, and I discussed it in my own recent book, Power: Limits and Prospects for Human Survival. The data-driven, mathematical methods you and your colleagues have developed for understanding patterns in history seem highly illuminating. In the U.S., rising economic inequality (since the 1970s) has immiserated the working class, while the number of elites (e.g., billionaires) and elite aspirants (e.g., people with law degrees) has skyrocketed. As you show... these developments align with a historical pattern seen repeatedly in complex societies, and... never seems to end well. In End Times, you lay out... what your analysis means for the United States in the 2020s. It’s not a pretty picture. ...we’re seeing the evidence of increasing polarization and political ill will everywhere."

"The past few thousand years of human history have already seen several critical accelerators. The creation of the first monetary systems roughly 5,000 years ago enabled a rapid expansion of trade that ultimately culminated in our globalized financial system. Metal weapons made warfare deadlier, leading to the takeover of less-well-armed human societies by kingdoms and empires with metallurgy. Communication tools (including writing, the alphabet, the printing press, radio, television, the internet, and social media) amplified the power of some people to influence the minds of others. And, in the past century or two, the adoption of fossil fuels facilitated resource extraction, manufacturing, food production, and transportation, enabling rapid economic expansion and population growth. Of those four past accelerators, our adoption of fossil fuels was the most potent and problematic. In just two centuries, energy usage per capita has increased eightfold, as has the size of the human population. The period since 1950, which has seen a dramatic increase in the global reliance on petroleum, has also seen the fastest economic and population growth in all of human history. Indeed, historians call it the “Great Acceleration.” Neoliberal economists hail the Great Acceleration as a success story, but its bills are just starting to come due. Industrial agriculture is destroying Earth’s topsoil at a rate of tens of billions of tons per year. Wild nature is in retreat, with animal species having lost, on average, 70 percent of their numbers in the past half-century. And we’re altering the planetary climate in ways that will have catastrophic repercussions for future generations. It’s hard to avoid the conclusion that the whole human enterprise has grown too big, and that it is turning nature (“resources”) into waste and pollution far too quickly to sustain itself. The evidence suggests we need to slow down, and, in some cases at least, reverse course by reducing population, consumption, and waste."

"Depleting and climate-changing coal, oil, and natural gas have brought about dramatic human population growth, along with immense profits and unprecedented wealth (for the few). But all of these presumed and probably transitory benefits have been based on depleting natural resources, and on processes that are perilously changing the climate and degrading ecosystems across the planet. Every time we pick up a gasoline-powered machine we are viscerally linked to that chain of ersatz benefits and spiraling impacts."

"Most environmental dilemmas have to do with limits (usually limits to either resources or to waste sinks). And most environmental solutions have to do with reining in our wants and ambitions in some way. Cleverness may help at the margins—as when chemists identify a relatively harmless substance that can substitute for a toxic one. But without self-limits on population and consumption, no amount of cleverness can halt humanity’s accelerating march toward collapse. Economist William Stanley Jevons got an inkling of this stark reality in 1865, when he published his observation that making coal usage more efficient led to increased coal mining (and depletion), not conservation. Too often, we outsmart ourselves by thinking we’re doing something to save resources and reduce pollution, when in fact we’re just paving the way for more of the same. Another intelligence-resistant problem is deciding what’s a good life or a good death. These are arguably the most important personal questions with which any of us will ever grapple, but intelligence doesn’t always help with answers. It’s true that smart people sometimes avoid a lot of problems that plague less-smart people (such as falling prey to obvious scams and rip-offs). But they just as often end up burdening themselves and others around them with even bigger problems brought on by the unforeseen consequences of their own cleverness—as when a smart investor or inventor accumulates a huge fortune, over which their heirs fight bitterly, to the point that family dynamics are poisoned for generations to come. Finally, there is the uber-problem that should be at the top of all our minds—the long-term survival of humanity. We naturally want our species to stick around. And we like to think that our intelligence improves our prospects in that regard. But, so far, the evidence points in the opposite direction."

"For a population of field mice in overshoot, the critical resource might consist of small plants whose unusually robust growth has been triggered by high levels of rainfall. For humanity currently, the critical resource is fossil energy. Temporary energy abundance has led to many good things (for some of us, anyway): more food, more people, more commercial products, more knowledge, more comfort, and more convenience. But we are about to become victims of our own success."

"As we’ve grown our population and our per capita consumption rates, we’ve been taking habitat away from other organisms. As a result, nature is in full retreat. Vertebrate and invertebrate animal species have suffered average population declines of 70 percent in the past 50 years, and thousands of plant species are endangered as well."

"It’s sad when loved ones die, and few of us look forward to our own demise; hence the perennial quest for an elixir of eternal life, or at least a cure for cancer. But if nobody died, the planet would quickly fill with humans and empty of all the things that feed and provision us. Death clears space for new life; it is the non-negotiable price of admission to the great banquet of existence."

"Limits exist everywhere in nature. Physics, chemistry, biology, geology, astronomy—pick your field, dig into the literature, and you’ll soon be struck by how everything in the universe is defined by limits of temperature, weight, volume, density, number, power, frequency, speed, and more. Limits enable the functioning of systems at scales from the subatomic realm all the way up to galaxy clusters. If there is any physical thing that could credibly be claimed to be infinite, it is the universe itself. But not all cosmologists believe the universe is infinite, and proving whether it is or not may be impossible in principle. Leaving the totality of the cosmos to one side (an action possible only within the human brain—which does, most assuredly, have its own limits), everything else we encounter in life has boundaries. So, why have many people become obsessed with either denying or overcoming limits, to the point where they appear to feel that life can have meaning only if it’s tied to some limitless thing, quality, or substance? Humanity’s obsession with limitlessness probably began with the origin of language, which enables the asking of questions. People tens of thousands of years ago began to ask, “What happens to our essential sense of self when we die?” Their efforts to manage existential terror likely led them to tell stories about a boundless otherworld in which the dead live forever. Looking up at the night sky, they saw a realm of blackness punctuated by moving points of light; upon this screen they projected their wants, needs, and fears. Our lives and those of all the creatures around us may be brief, these early people must have thought, but there is another dimension that lies beyond—a dimension without endings. We’ve been searching for a path to infinity ever since."

"Global human population has doubled three times in the past 200 years, surging from 1 billion in 1820 to 2 billion in 1927, to 4 billion in 1974, to 8 billion today. Its highest rate of growth was in the 1960s, at over 2 percent per year; that rate is now down to 1.1 percent. If growth continues at the current rate, we’ll have about 18 billion people on Earth by the end of this century. All of this would be fine if we lived on a planet that was itself expanding, doubling its available quantities of minerals, forests, fisheries, and soil every quarter-century, and doubling its ability to absorb industrial wastes. But we don’t. It is essentially the same beautiful but finite planet that was spinning through space long before the origin of humans."

"Agriculture enabled population growth and social complexity, but it gradually robbed soils of nutrients. Sailing ships guided with clocks and navigational charts could increase the scope of trade, but building wooden ships (and making charcoal for forging steel) was leading to the deforestation of whole continents. A reckoning with limits seemed to be in store. Then a miracle happened. People who lived in some key centers of global trade started using fossil fuels—energy sources capable of delivering power in previously unimaginable and seemingly endless quantities. Coal, oil, and natural gas enabled the development of transport technologies (steamships, railroads, cars, trucks, and airplanes) that overcame prior limits to the speed of travel and trade, so that products and resources that were abundant in one place could be transported to places where they were scarce. Fossil fuels could be used to increase the rates of resource extraction via powered mining machinery, and to process lower grades of ores as more concentrated ores were depleted. They could be fashioned into plastics and chemicals to substitute for some natural materials that were getting scarce, such as hardwoods and whale oil. And they could be made into artificial fertilizers, which could replace soil nutrients lost due to unsustainable agricultural practices. All these developments together enabled population growth at rates that far outstripped historic trends: human numbers expanded from one billion to eight billion in a mere two centuries. We were, in effect, stretching existing constraints on population and consumption to the point that it was difficult for many people to see that boundaries still existed at all."

"…civilization’s survival dilemma in the 21st century is best described by a concept from population ecology—overshoot. This refers to the situation where a crucial resource temporarily becomes more abundant, thereby enabling a group of organisms to grow its population beyond levels that can be sustained over the long run. For a population of field mice in overshoot, the critical resource might consist of small plants whose unusually robust growth has been triggered by high levels of rainfall. For humanity currently, the critical resource is fossil energy. Temporary energy abundance has led to many good things (for some of us, anyway): more food, more people, more commercial products, more knowledge, more comfort, and more convenience. But we are about to become victims of our own success."

"Life may be unique to Earth. Even if single-celled organisms can readily evolve in conditions that exist on millions or billions of other planets, we have no actual evidence that complex, multi-cellular life exists anywhere else in the vastness of space. Bacteria appeared on our planet roughly 3.7 billion years ago; by 2 billion years ago, the tree of life was branching into what would become a stunning web of creatures, huge and tiny. Plants, animals, and fungi proliferated, formed relationships, and produced ecosystems. The result was a planet full of life, and one whose atmosphere, temperature, chemical composition, and weather are all largely shaped by the side effects of the strategies that organisms use to thrive. However, in a matter of mere centuries, we humans are unraveling the web of life and triggering a mass extinction event that is likely to impact virtually all species on the Earth, and to destabilize the fundamental planetary systems upon which we too depend. Mass extinctions have happened before. The web of life is, paradoxically, both resilient and fragile. On five previous occasions (most recently the Cretaceous-Tertiary extinction 65 million years ago) our world lost up to 95 percent of its species. The current wave of extinctions that’s being triggered by humans is, so far, not on the same scale, but it is proceeding far more rapidly than previous ones. We humans represent a new kind of threat to the rest of life: our development of language, tool-making, and fire-spreading rendered us hyper-effective hunters and foragers. Tens of thousands of years ago, we were already reshaping landscapes and impacting wildlife. Our ability to expand our own habitat has generated unwanted results: some prey animals were hunted to extinction, and in a process of competitive exclusion, humans caused many local extirpations by appropriating the resources of habitats for themselves. These unintended effects then impacted humans themselves, often by compromising their food supply. Therefore, over time, humans who stayed in any given ecosystem long enough to learn its limits embraced cultural traditions to moderate their demands on it. However, since the start of the European conquest of most of the rest of the world, and especially since society’s rapid adoption of fossil fuels starting around 1800, human impact on the biosphere has accelerated at a breathtaking pace. Expanding human populations and associated land use changes, industrial agriculture, industrial forestry, industrial-scale fishing, proliferation of toxic chemicals, and climate change are decimating native species of plants and animals around the world. According to some estimates, populations of many non-domesticated species have declined, on average, by 70 percent, and the pace of species extinctions has quickened to 100 or more times the usual or “background” rate. What will the world come to look like if these trends continue? In one scenario, Earth will have become fully domesticated in a century or two, so that humans and machines control planetary systems (including climate patterns, ocean currents, the water cycle, and the carbon cycle). In this possible case, very little of wild nature will be left. In the far more likely scenario, the unraveling of the web of life and the destabilization of planetary systems will lead to the collapse not just of biodiversity but civilization as well. Is it too late to save biodiversity and the living Earth? … I’ll argue that only a collective effort to put wild nature at the center of our priorities will prevent its devastation and the possible disappearance of our own species, among countless others."

"Using science, technology, and cheap energy, we expanded farmlands, chain-sawed forests, exploited fisheries, mined minerals, pumped oil, and flattened mountains for their buried coal. And we did these things in a way that was not remotely sustainable. By harvesting renewable resources faster than they could regrow, by using non-renewable resources that could not be recycled, and by choking environments with industrial wastes, we were borrowing from future generations and from other species."