Evolutionary theory develops from Darwin's argument which “suggests that a process of natural selection leads to the survival of the fittest and the development of traits that allow a species to adapt to its environment. “ Many have gone a step further by stating that our genetic inheritance determines not only our physical traits but also some personality traits and social behaviors. There is such controversy about meaningful behaviors that develop because many believe we are already a pre-programmed human species. It has also been argued that evolution is reflected in the functioning and structure of the nervous system and that it has evolutionary factors that have a significant influence on everyday behavior. What is being said means that if we follow evolutionary theory, then it would be said that we are already pre-programmed before birth to follow certain protocols in life. Whether it's finding a partner or finding a job. This theory is also believed to provide insights from our system to follow, providing us with some aspects of the lives of our ancestors. By believing in this theory we can determine the importance of heredity in influencing human behavior. Behavioral geneticists and evolutionary psychologists both agree that not only do genetic factors provide specific behaviors or traits, but they also show limits to the emergence of such traits or behaviors. This means that our genetics will determine how tall we will be up to what... middle of paper... we are all unique in our own way and at some point we will realize our potential and strive for more, not that our genes will make us have made us act the way we do. Evolutionary theory also holds that we are not in control of ourselves when it comes to free will, while humanists believe that everyone is capable of making their own decisions. Evolutionary theory also suggests that the personality of some remains stable throughout life, while humanists believe that personality is flexible and resilient throughout life. Works Cited (Feldman, 2009; Pg. 401) (Feldman, 2009; Pg. 401) (Feldman, 2009; Pg. 401-402) (Feldman, 2009; Pg. 401-402) ¬Essentials of Understanding Psychology, 8th Edition Robert S. Feldman McGraw-Hill Higher Education, 2009 Pages 8-9, 64-65 and 328