Jonathan Haidt - Morality and Politics

Jonathan Haidt is a (social/moral) psychologist at the University of Virginia and I was very much impressed by his book The Happiness Hypothesis. Haidt has long been studying how moral decision are made, and a little more recently has been exploring how these feelings and judgements influence politics.
I highly recommend checking out the book and some of the links below.

Advice to Obama
NYTimes review of Haidt's ideas
Scholarly paper that examines the source of moral judgements.