habitable planets

[Gawdzilla Sama]

Well, once already we have gone from less than 10000 breeding individuals to a dense globe spanning swarm of locusts in less than 75,000 years.

I doubt even humanity’s most outstanding trait - its wonton self destructiveness - is close to being the equal of  the task of putting a stop to our depredation of our planet.

The planet was in much better shape during the period you mention than it will be if things truly go south on us. No comparison is possible. A more appropriate comparison might be this one, we'll have to see:

Permian–Triassic extinction event - Wikipedia

The Permian–Triassic extinction event, colloquially known as the Great Dying, the End-Permian Extinction or the Great Permian Extinction, occurred about 252 Ma (million years) ago, forming the boundary between the Permian and Triassic geologic periods, as well as the Paleozoic and Mesozoic eras. It is the Earth's most ...