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Well because there is no proof.
The North, especially the Northeastern section, of the US had many factories pre-1900s. The South mostly had plantations. Both needed each other.
Mass extinctions--at least two--one at the end of the Permian, and one at the end of the Cretaceous, with numerous other less severe events. As far as the extinction of individual species, that list would cover millions of extinct organisms.
Paleozoic
Paleozoic
In the early 1900s, some women worked in factories or as teachers (among many other things). Apex-Secretaries and managers
Superman didn't exist in the 1900s
135,000
48
By the 1900s, many hundreds of ships had sailed around the world.
The 1900s goes from 1900 to 1999. GM was founded in 1908. The answer will be millions.
two centuries