[softwarelimits]

May I humbly ask:

What are your qualifications that enable you to come to this conclusion?

I would be very interested in studying your publications - where can I find your analysis?

Also it would be really very appreciated if you would like to publish the datasets that lead you to this conclusion - would you like to give us a public repo with the data, so we can check your results?

Thank you very much!

[ppf]

That's not very humble. His assertions are quite basic, and don't need research-grade qualifications to consider. The earth has certainly prehistorically been much warmer, so nature handled it just fine, and it is an interesting question to consider how much more arable land a warmer earth would have.

[Sharlin]

Earth has not been considerably warmer prehistorically (a term that, technically speaking, refers to the period between the appearance of tool-using hominins and the invention of written history). If you mean paleontological periods before the appearance of genus Homo, yes, but that's not very relevant given how the GP talked about the human civilization (which, incidentally, did not exist in the prehistoric era either!)

As far as we know, the loss of arable land caused by the climate change (and other anthropogenic environmental changes) far outweighs possible gains elsewhere, and even if it didn't, agricultural land area is not exactly fungible.

[orbifold]

The details make it a very hard problem. There is scientific consensus that a too rapidly changing climate leads to mass extinction of species (plants, animals, etc.), because suddenly species are not adapted to the climate they find themselves in and can't migrate quickly enough. This loss of biodiversity should be of great concern, because it is irrecoverable. There are tons of other non-obvious problems that are not commonly understood.

[softwarelimits]

Would you please like to add data and evidence to add some substance to your words? It is not enough to just "say something" on the internet - you need to provide evidence if you want to be taken seriously.

[whatawaste]

The earth has also been molten rock at one point too, the issue is can humans survive in that environment, not just the fact the earth is warmer.