Carl Rogers developed humanistic psychology and person-centered therapy. He believed people are essentially good and have the capacity for self-actualization. The key aspects of his theory are: unconditional positive regard from the therapist, empathy, and congruence in the therapeutic relationship to help clients reduce incongruence between their actual and ideal selves. When these conditions are met, clients can tap into their inherent potential for growth and resolve problems without direct intervention from the therapist.