In the multi billion year history of the earth the climate has changed yes. For the whole of human history (the past 10-12 thousand years) it has not changed al

In the multi billion year history of the earth the climate has changed yes. For the whole of human history (the past 10-12 thousand years) it has not changed all that much. This stability has given rise to countless civilizations and human flourishing. Now we have upset this stability and will have to spend a large part of our economic output just to defend our current standard of living. The less we do about climate change, the worse we'll have it. The planet will be fine and humanity won't disappear, but we lose a lot of opportunities every year we sit on our asses.