Recent Issues. Chapter 2: The Origins of Cognitive Thought. Quote 13
“We can trace a small part of human behavior, and a much larger part of the behavior of other species, to natural selection and the evolution of the species, but the greater part of human behavior must be traced to contingencies of reinforcement, especially to the very complex social contingencies we call cultures. Only when we take those histories into account can we explain why people behave as they do.” (p. 45)
