Populations expand until they collapse their food supply. Equilibriums are reached eventually but they are never very stable, at least from a geological time fr

Populations expand until they collapse their food supply. Equilibriums are reached eventually but they are never very stable, at least from a geological time frame. Humans have overcome a number of hurdles, but to say we are immune to the same pressures is just hubris. Already populations are declining in wealthy countries, what will happen in JApan in 50 years? No one knows because it's never happened to such a wealthy technologically advanced country. Food cost spiked several times in the 2000s leading to food riots and was a likely catalyst of the Arab Spring. World fishing stock is over exploited and total world wild catch has flat lined the last 5 years, aquaculture has made up the difference but that is an entirely new area and the environmental effects are uncertain. Technology may save us, but blind optimism is no different than baseless pessimism. Global climate change is happening, no one knows how fast or have massive those changes will be, we just know it's happening. From a geological perspective we are already living through a mass extinction event, our influence has been profound and will be seen for millions of years in the fossil record.