You are a.ssuming early man was primitive because of your preconceived notion towards evolution. You ignore things like ancient writings, pyramids, astronomers, etc. that say otherwise. Where's your evidence that the mortality rate was so drastically high? Why do you a.ssume all of early man were nomadic? And why do you a.ssume they weren't very skilled in delivering children (ancient Egypt says otherwise).
ok look dude, im not gonna get stupid with you. ancient egypt did not exist 200,000 years ago nor do any ancient writings, pyramids, etc. the agricultural revolution did not exist 200000 years ago either. its responsible for evolved traits in humans that we can trace today, like lactose intolerance, disease resistance, etc that differs from people to people based on diet, and a whole host of other sh*t. modern humans themselves with our capabilities and crainal capacities and anatomy did not exist in this form before 200000 years ago and there is no evidence of high culture that goes back that far which is likely because there was no agricultural evolution to drive the population. if there is no consistent food source, you cannot sustain a large population, esp when that population is primarily moving herds of animals. plus is confers a disadvantage to females anyway to reproduce a lot in that type of lifestyle because it stifles mobility. look dude, i could sit here and keep arguing with you, but it makes no sense. maybe another time other than finals