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 centre opinions, say US 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, according to the study by the University of California and Harvard. The research, based on 2,000...