Theory's contribution to our current understanding of human personality

Imagine that TWO of the theorists below were invited to speak at a symposium on personality theory development and are both on the stage. Someone in the audience raises her hand and asks, "So what do you think was your theory's greatest contribution to our current understanding of human personality?" What would each of the theorists you chose say in answer to the question? Choose from among Freud, Jung, Adler, Rogers, and Horney.