Evolutionary psychologists have been criticized for emphasizing adaptationism because according to the adaptationists, if a bodily structure or a behavioral tendency now exists, it must have contributed to the survival of the ancestors of a species. This theory has been criticized since it has been discovered that there are three significant faults with this theory. The first fault is that there are other factors other than adaption that causes evolutionary change. For instance, two examples are genetic drift, and genetic mutations. The second fault with the theory is that a trait is not necessarily adaptive in the present environment because it was adaptive in past environments. For instance, a trait that was previously made one maladjusted
