We discussed this in my psychology class, about how we shouldn't differ natural selective pressure from social pressures. There is no possible way we could of adapted so quickly over a short period of time. When we figured out how fertilize and use the lands resources rather than wander we are able to put our mind towards things other than survival. The same way that every generation in advanced countries IQ is on the rise has nothing to do with the fact that we are breeding smarter babies. I thought this was a great insight on how our minds have begun to develop from hunter gatherers, but we had two very religious Christians in the room who were pissed because this would also be under the assumption we evolved from a less intelligent non dominant species. They would like to think we have always been this smart because we were given this intelligence to acknowledge God. Which made me wonder would a child who was barred from other humans in the wilderness would probably act out the same way our ancestors did. That would mean this child would not be worthy of our societies God because they don't possess this knowledge. Also intelligence then isn't a factor of how many math problems you could work out or how much you can memorize but how well you can problem solve. As hunters in order to survive we would need a intelligence advantage over much faster predictors, being a social life form intelligent members designing improved weapons allowing for our survival.