459
A lot, I'd reckon
(lemmy.dbzer0.com)
No one left alive at one point:
https://www.scientificamerican.com/article/human-ancestors-nearly-went-extinct-900-000-years-ago/
A lot more inside time? We probably be at least 20years ahead of where we are now with video games. With a more common enemy we might be less likely to squabble so much with one another. Religion would probably be a little more standardized as well.
Probably a net positive really.
Better than cancer I guess
The Visible Hand
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