"Thanks to the discovery and exploitation of fossil fuels, humans (really just a small minority of them) are able to live richer lives today than even the queens and kings of yore could have dreamed of. Furthermore, we’ve used some of those finite resources to increase food supplies and to expand the human population, which provides the economic system with both more workers and more consumers, a necessity to keep the economy growing under our current economic model. The world’s population increased from 1.6 billion in 1900 to 7 billion today, and we add about 80 million more each year. Humans have quickly become the most numerous megafauna on the planet."