Homo sapiens lived alongside an estimated eight now-extinct species of humans. There were an unknown number of previous species before that.

They are all extinct.

To answer your question, the majority did not.

I'll take my chances with modern science and medicine, thank you (even with some significant ambiguities and occasional missteps (especially WRT our environment.)

How pre historic humans survived is like how many species survive today- have a brood or litter of 10, if 3 or 4 make it to breeding age to continue your line you've done well!

Some didn't make it.

Half died before the age of 5, just as an example of what "some" means.

> Interesting fact that since cancer research started the deaths from cancer went up by 1000%.

Same could be said of any deadly and widespread disease. Tuberculosis, COVID, etc. This is the result of expediency+improved testing, not some reverse causation.

Back before we discovered viruses, nobody died from them (that we knew of.)

Right so why viruses now not then?

Too many unanswered questions