Jonathan Haidt, author of The Righteous Mind, believes that moral intuition comes before reason:
Our flawed post-hoc reasoning, our cherry-picking of evidence to suit our instincts, makes us poor policy makers, and creates politics that is tribal, confrontational and ill-suited to solving the world's problems. "Our reasoning is very good as a press agent and lawyer," says Haidt, "But we're so biased, no individual can design social policy just using reason. But once you can accept what reasoning is and what it is designed to do, you can start to design groups and institutions that can do a pretty good job of it. When you put people together, you can think of each person as being like a neuron, and if you put us together in the right way then you can get some very good reasoning coming out of it."
More on Haidt's theory of human nature and politics here, here and here.
The Dish 