" No one will ever find a gene for “evil,” or for beauty, or for musical genius, or for scientific genius, because they don’t exist. DNA is not destiny. The presence of a particular variant of a particular gene may just have the effect of altering the odds of any particular behavior. More likely, the possession of many slight differences in many genes will have an effect on the likelihood of a particular characteristic, in consort with your environment, which includes all things that are not DNA. "

― Adam Rutherford , A Brief History of Everyone Who Ever Lived: The Stories in Our Genes