Sense of personal worth and ability that is fundamental to an individual's identity. Family relationships during childhood are believed to play a crucial role in its development. Parents may foster self-esteem by expressing affection and support for the child as well as by helping the child set realistic goals for achievement instead of imposing unreachably high standards. Karen Horney asserted that low self-esteem leads to the development of a personality that excessively craves approval and affection and exhibits an extreme desire for personal achievement. According to Alfred Adler's theory of personality, low self-esteem leads people to strive to overcome their perceived inferiorities and to develop strengths or talents in compensation.