You're right, but this still doesn't mean sex didn't play the biggest role because imagine sex was not as easily accessible as I've described in the post, imagine reproduction wasn't in geometric progression like I also explained, no matter how good they get at escaping predators and gathering resources they wouldn't have kept the species going! Their chances would have been zero if sex wasn't so easy and reproduction wasn't in geometric progression.
RE: Why the Survival of the Early Man is not a Big Deal