Behavior genetics is a field that has experienced rapid advancement, the likes of which are unparalleled, with the exception of advances in computer science. The first great triumph of behavior genetics was to create widespread understanding that nearly all behavioral outcomes are under some degree of genetic influence, representing a drastic shift from the first half of the 20th century, when behavioral disorders were viewed largely as environmentally determined. If the first 50 years of the field were dedicated to demonstrating that a wide range of human behavior is genetically influenced, the next 50 years will surely be consumed with mapping those genes and applying this newfound knowledge.
