I always thought conservatives seemed less able to deal with facts that conflicted with their simplistic understanding of the world. Put this study together with the study that shows those with lower cognition abilities as children tend to become racist adults and gravitate towards right wing mind set, and you have a picture of people with lower IQs who adopt conservative philosophies and have smaller ability to understand the complexities of our world. Interesting, yes?
A different breed of human? Definitely.

http://en.wikipedia.org/wiki/Biology_and_political_orientation