Predisposed: Liberals, Conservatives, and the Biology of Political Differences

'Predisposed presents evidence that people differ politically not just because they grew up in different cultures or were presented with different information. All these factors certainly play their role but people also differ politically because they have diverse psychological, physiological and genetic traits. This biologically-based, physio-cognitive machinery influences much of what makes people who they are, including their personalities, preferences for occupation and leisure pursuits, tastes in art and music, strategies for child rearing and, yes, orientations to politics. In short, this machinery predisposes people to see and understand the world in different ways. These predispositions are in turn responsible for a significant portion of the political conflict that marks human history'--