Parents provide their children with genes as well as an environment, so the fact that talkative parents have kids with good language skills could simply mean that and that the same genes that make parents talkative make children articulate.
Steven PinkerThe European wars of religion were more deadly than the First World War, proportionally speaking, and in the range of the Second World War in Europe. The Inquisition, the persecution of heretics and infidels and witches, they racked up pretty high death tolls.
Steven PinkerIn a high tech world the cure for the tragic shortcomings and perilous fallacies of human intuition is education, but education in economics, evolutionary biology, probability and statistics - unfortunately most High School and College curricula have barely changed since Medieval times!
Steven Pinker