Argument: Democrats appreciate nuances; Republican think black/white
Jonathan Haidt. "What Makes People Vote Republican?" AlterNet. September 16, 2008: "conservatism is a partially heritable personality trait that predisposes some people to be cognitively inflexible, fond of hierarchy, and inordinately afraid of uncertainty, change, and death. People vote Republican because Republicans offer "moral clarity" -- a simple vision of good and evil that activates deep seated fears in much of the electorate. Democrats, in contrast, appeal to reason with their long-winded explorations of policy options for a complex world."