Your reply could be more civil. Many scientists warn that we are probably in one of the great extinction events. It's happened before, and past success is no g

Your reply could be more civil. Many scientists warn that we are probably in one of the great extinction events. It's happened before, and past success is no guarantee of future success. I might add that our ancestors didn't have an abundance of nukes either. I know a lot of what the Earth has seen. Huge glaciers, global hypoxia, mass extinctions, cataclysmic events... your response ignores fact that there never has been 4.5 billion Homo sapiens sapiens living all at once before. What a coincidence that I should be here to see it!