The discipline of psychology provides the vast ambient culture with a scientific pursuit of its mystical assumptions about human beings and their behavior. The postulates that serve as the foundation for traditional psychology, like the postulates that inform the work in any discipline, are largely immune to the change effects of scientific evidence. Behavior analysts seek the resources of the psychology establishment, while psychologists, in general, seek to associate with the powerful image of natural science. Many natural scientists would prefer to see psychologists adhere more closely to the postulates of naturalism. However, under neither side's motive-nor any motive-can evidence change the fundamental nature of the other intellectual faction, because the postulates to be changed function as the principles by which the adduced evidence is interpreted in the first place. An integral natural science discipline focused on behavior is possible only if the behavioral community organizes effectively for its development and maintenance, but current arrangements ignore the lessons of history and do not serve that outcome. Students in behavior analysis are entitled to a more accurate revelation of what they confront in the struggle to induce change in psychology and a more substantial defense, if that is possible, of the proposition that they devote their lives to the pursuit of that quest at the expense of the integrity of their own discipline.