Computer modeling suggests climate change might just do it though. The disruptions that come from it would only continue to become more extreme post-collapse -

Computer modeling suggests climate change might just do it though. The disruptions that come from it would only continue to become more extreme post-collapse -- and our ability to quickly adjust in such a way as to reduce them would be destroyed with civilization -- making rebuilding difficult or impossible. https://www.theguardian.com/environment/earth-insight/2014/mar/14/nasa-civilisation-irreversible-collapse-study-scientists https://www.theguardian.com/environment/earth-insight/2014/m...