We don't need weapons or viruses or other catastrophes to end our civilisation. We just need to keep on breeding.

World population has gone from about 2 billion to almost 8 billion in the last 100 years.

We're well aware of the limited resources of our finite planet, yet the only metric of economic success is growth.

It's a pyramid scheme, and at some point, it has to collapse. Unless we expand beyond this planet, I suppose.