[Robert A Cook PE]

?

I think it was just coincidence that every large (food-bearing) large mammal in North America vanished at the same time the new (culturally-correct, pristine and non-threatening) 2-footed North American mammals arrived om scene.

Since only European white Christian males kill animals. The rest of the world is innocent. 8<)

[SandwicheGuy]

I think it was just coincidence that every large (food-bearing) large mammal in North America vanished at the same time the new (culturally-correct, pristine and non-threatening) 2-footed North American mammals arrived om scene.

That is sarcasm, I think, but you know, sometimes a coincidences is just a coincidence. It is quite possible that a population moved in after some event caused the collape of the large mammal population. It may have been a meteor.