Indeed, and we are probably facing new selection pressures. Such as the propensity toward addictions to substances our ancestors would not have had (http://ww

Indeed, and we are probably facing new selection pressures. Such as the propensity toward addictions to substances our ancestors would not have had (http://www.guardian.co.uk/society/2012/nov/28/painkiller-addiction-plague-united-states http://www.guardian.co.uk/society/2012/nov/28/painkiller-add...).