A growing body of literature is questioning whether existing models of human development apply equally to men and women. Prevailing theories of human development have been criticized for being based on research with primarily male subjects of similar ethnic, racial, or class backgrounds. Some research supports the viewpoint that women have…

Various researchers, including Carl Jung, Charlotte Buhler, Erik Erikson, and Robert Havighurst, have formulated sequential models of adult development. More recent investigators, such as Daniel Levinson, Roger Gould, and Gail Sheehy have formulated age-related sequential models of adult development that view the various stages of adulthood in…