Chapters 1 & 2 Study Guide: Evolution & Research Enterprise ? Chapter 1 Key People: Carl Rogers: One of the most prominent architects of the humanistic movement. He, along with Abraham Maslow, argues that human behavior is governed primarily by each individual?s sense of self, or ?self-concept? ? which animals presumably lack. He argued that in order to fully understand human behavior, psychologists must take into account the fundamental human drive toward personal growth. He asserted that people have a basic need to continue to evolve as human beings and fulfill their potentials.