 While I'm principally referring to the DRD4 gene, see Chapter 5, the science of genetics is embryonic, with new discoveries being made every day. No doubt, sometime soon we'll have a better, more complete list of the specific genes that make up what Dave DeBronkart first called the Edison trait back in 1992, and Lucy Jo Palladino expanded on considerably in 1997 in her wonderful book, The Edison Trait. For the moment, though, I'll use the useful shorthand of the Edison gene.