Reply #65: Why would you expect interbreeding?

[jeff47]

People tend to couple with those that share their political beliefs. So if there is some genetic component that causes political beliefs, that will tend to get reinforced as people who share that trait have children.

Now, the real issue is applying the "conservative" and "liberal" labels to this study. Really they showed that people who's political beliefs are based on fear tend to have one physical trait in their brain. At the moment, conservatives are using fear-based politics, so people with this trait are going to label themselves "conservatives". But the party label is independent of the tactics.