Humphrey: No, but it's a gene that 'predisposes those carrying it to liberal political ideology'.
They go on: 'Simply having the gene ? ... ? is not enough by itself to make someone a liberal,... The study found that adults with the gene were more liberal depending on how wide their circle of friends was while they were growing up.
"It is the crucial interaction of two factors ? the genetic predisposition and the environmental condition of having many friends in adolescence ? that is associated with being more liberal," the researchers state. They found that the correlation held true independently of gender, age or ethnic and cultural background.'
According to the study: "Ten friends can move a person with two copies of [the gene variant] 7R allele almost halfway from being a conservative to moderate or from being moderate to liberal."
The research, led by James Fowler of the University of California's San Diego campus, suggested that those with the novelty-seeking gene variant would be more interested in learning about their friends' views, exposing them to a wider variety of lifestyles and beliefs and making them more liberal as a result.
"These findings suggest that political affiliation is not based solely on the kind of social environment people experience," said Fowler, a professor of political science and medical genetics best known for his work on social networks with Nicholas Christakis of Harvard, who worked on this study.
So you are right: 'The authors, however, say their findings should be "treated cautiously" and that more research is needed before hailing a liberal gene. "The expectation in genetics is that only repeated efforts to replicate associations on independent samples by several research teams will verify initial findings like these," they wrote. "Perhaps the most valuable contribution of this study is not to declare that 'a gene was found' for anything, but rather, to provide the first evidence for a possible gene-environment interaction for political ideology."
So it's not rocket science: a certain sort of personality + a certain sort of environment can lead to a certain set of political ideas. Most of us would probably have guessed that anyway. But what about the 10 friends business?
What really interests me is how this knowledge is applied. For example, if you want a little liberal, you'll take him to lots of parties, whereas you'll keep your little conservative in a locked room?