God Gene

The God gene hypothesis proposes that a specific gene (VMAT2) predisposes humans towards spiritual or mystic experiences. The idea has been postulated by geneticist Dean Hamer, the director of the Gene Structure and Regulation Unit at the U.S. National Cancer Institute, and author of the 2005 book The God Gene: How Faith is Hardwired into our Genes.

The God gene hypothesis is based on a combination of behavioral genetic, neurobiological and psychological studies. The major arguments of the theory are: (1) spirituality can be quantified by psychometric measurements; (2) the underlying tendency to spirituality is partially heritable; (3) part of this heritability can be attributed to the gene VMAT2; (4) this gene acts by altering monoamine levels; and (5) spiritual individuals are favored by natural selection because they are provided with an innate sense of optimism, the latter producing positive effects at either a physical and psychological level.

A number of scientists and researchers are highly critical of this theory; Carl Zimmer, writing in Scientific American, questions why "Hamer rushed into print with this book before publishing his results in a credible scientific journal." In his book, Hamer also writes "Just because spirituality is partly genetic doesn't mean it is hardwired."