Environmental influences outside the family environment, such as school and friends,
are often more important to the development of personality. However, these apparent "outside
influences" may have more to do with genes than it would seem at first. People seek out or even
create environments to which they are genetically predisposed. For example, a combative person is
more likely than a peace-loving person to find an environment in which arguments are likely to take
place, or to create such an environment by starting fights.
As seen from the above, an individual's genotype and the environment are not
just independent sources of influence that add together to form an individual's personality.
The genotype is in
correlation with the environment. An individual's genotype also shapes the environment.
Interaction and influence of heredity and environment with each other form a person's personality.