As the founder of both radical behaviorism and behavior analysis, B.F. Skinner attempted to demonstrate orderly relations between behavior and the environment. He posits that if the environment is altered, then the feelings and thoughts of the individual will change accordingly. As the system is based on rewards and punishments, Skinner puts much emphasis on the reinforcement of desired behavior. He underscores the importance of mostly reward and to some extent to punishment in learning. As he calls it behaviorism is "a theory of learning which states all behaviors are learned through interaction with the environment through a process called conditioning." That's why behaviorists believe that "people act in response to internally or externally generated physical stimuli." For them, human nature is shaped, and in a way, is a product of the environment. If you change the environment, you change human being's social, psychological, emotional, cognitive faculties. Furthermore, good behaviors are backed up if reinforced, and undesired behaviors or misbehaving can be changed if privileges are removed or punishment is inflicted.