For lack of better terms, humanity used to be a little more "diverse" than it is today. The neanderthals and erectus were human (they used tools and fire and are thought to have been capable of speech, and neanderthals at least wore clothing and made spears and specialized stone tools too) but they were anatomically different from what we would consider 'modern' humans, which lived along side them for some periods of time and may have mixed somewhat with them.
It wasn't too terribly long ago, only about 30,000 years ago. To put that in perspective it was around 15,000 years ago that agricultural societies starting springing up, so about twice as long.
Amino acid degeneration disproves the theory of 30,000 years of existence. Roman legionaries used to carry half their body weight for marathons of marching, and its plain to see cellular degeneration anywhere. I studied evolution and about 99% was outright disproved, and the rest was so wacky that there was no way to make a test to verify it. C14 readers see fossils age at several million years a month, because at a certain point this radioactive isotope does run out and the readers give near-infinite readings from 3000 years onward guaranteed.
The whole point of "agricultur[al]e" and "socie[ties]ty" springing up as our own ideas is a direct attack, saying that advancement, values that allow a group to survive and peaceful co-existence worked just fine before any G-d, that we we're doing just fine without any G-d, and that we do come from a lesser version of ourselves, so it is us that makes us advance and evolve, and not G-d creating us. It's to make up a system without G-d, then pretend it could work.
Everyone of these early humans turns up as a pig jaw on a man, a deformed skull, and a myriad of other hoaxes that you can't see without laughing at the maniacs that swear by them.
15,000 years, 30,000 years was before the Torah says G-d taught Adam. How did they figure out how to survive? The only way no G-d works is if they evolved from a lesser being that knew how to eat from early on. But then you've just swallowed the whole load that can never be proven, and the more information on it is available the more evident the absurdity of the mere concept is.