Gordon Allport
Gordon Willard Allport (November 11, 1897 - October 9 1967) was born in Montezuma, Indiana, in 1897. Allport is considered a trait theorist, which he believed predominate a person's personality. These were referred to as central traits, traits which help in the development of personality when one of these becomes an apparent force, these are referred to as a person's cardinal traits. Both the central traits and cardinal traits are influenced by environmental factors.