>>405
Due to the spin of the earth, the massive continent becomes centered on the equator. The interior is a hot desert. Animals like reptiles thrive while mammals struggle. No mammals bigger than a rabbit ever evolve.
But let's pretend somehow humans still evolved. The harsh environment and lack of diversity keeps them stuck with primitive society and technology.
>>407
What's it like in the universe where staunch environmentalism is the norm and only small groups of activists are anti-eco? (They prefer to call themselves "pro-human")