"Our core ecological problem is not climate change. It is overshoot, of which global warming is a symptom. Overshoot i…"

"During the last 200 years, per capita energy usage grew eight-fold, while human population expanded at about the same…"

"Prior to the widespread use of coal, oil, and natural gas, agrarian societies saw cyclical periods of rise and fall. …"

"Fossil fuels enabled a dramatic expansion of energy usable by humanity, in turn enabling unprecedented growth in huma…"

"Global human population has doubled three times in the past 200 years, surging from 1 billion in 1820 to 2 billion in…"

"Climate change is a wicked problem… [and] there is no way to solve it without sacrificing something that society curr…"

"Limits exist everywhere in nature. Physics, chemistry, biology, geology, astronomy—pick your field, dig into the lite…"

"Agriculture enabled population growth and social complexity, but it gradually robbed soils of nutrients. Sailing ship…"

"As we’ve grown our population and our per capita consumption rates, we’ve been taking habitat away from other organis…"

"If we do nothing, we still get to a post-carbon future, but it will be bleak. However, if we plan the transition, we …"