Is liberalism a genetic disorder?

People with left wing views may have their political opinions controlled by a "liberal gene", according to scientists. The research suggests that some people have an inherent bias against conservative thinking, that is independent of their education or upbringing. The effect is caused by a neurotransmitter in the brain called DRD4 which could be stimulated by the novelty value of left of center opinions, say researchers. In people who are naturally outgoing, the feature encourages them to seek out companions with unconventional views as they grow up. This in turn means they tend to form less conventional political viewpoints as adults. DRD4 is controlled by dopamine which affects the way the brain deals with emotions, pleasure and pain and can therefore influence personality traits.