After analyzing the DNA of 13,000 Australians, scientists recently found several genes that differed between liberals and conservatives.15 Most of them related to neurotransmitter functioning, particularly glutamate and serotonin, both of which are involved in the brain’s response to threat and fear. This finding fits well with many studies showing that conservatives react more strongly than liberals to signs of danger, including the threat of germs and contamination, and even low-level threats such as sudden blasts of white noise.16 Other studies have implicated genes related to receptors for
...more
