One of this psychologist's studies analyzed an innovator in "militant nonviolence," and he characterized periods of aging in terms of paired concepts 
One of this psychologist's studies analyzed an innovator in "militant nonviolence," and he characterized periods of aging in terms of paired concepts such as industry vs. inferiority and integrity vs. despair. An advocate of the epigenetic principle, he also theorized periods termed genital-locomotor, anal-muscular, and oral-sensory. For 10 points, name this author of the psychohistories Gandhi's Truth and Young Man Luther, a psychologist who coined the term "identity crisis" and posited an eight-stage model of psychosocial development.
One of this psychologist's studies analyzed an innovator in "militant nonviolence," and he characterized periods of aging in terms of paired concepts such as industry vs. inferiority and integrity vs. despair.
Erik {Erikson}