It has been reported that the use of the terms "nature" and "nurture" as a convenient catch-phrase for the roles of heredity and environment in human development can be traced back to 13th century France . Some scientists think that people behave as they do according to genetic predispositions or even "animal instincts." This is known as the "nature" theory of human behavior. Other scientists believe that people think and behave in certain ways because they are taught to do so. This is known as the "nurture" theory of human behavior.
Fast-growing understanding of the human genome has recently made it clear that both sides are partly right. Nature endows us with inborn abilities and traits; nurture takes these genetic tendencies and molds them as we learn and mature. End of story, right? Nope. The "nature vs nurture" debate still rages on, as scientist fight over how much of who we are is shaped by genes and how much by the environment.