Abstract
Donald M. MacKay believed that freedom of action and human dignity are compatible with a science of behavior. In 1971 he argued this position with B.F. Skinner in a televised debate. After a brief biography of MacKay, several major points from this debate will be reviewed. The discussion serves to emphasize the correspondence rather than competition between levels of analysis, whether the levels are disciplinary (e.g. psychology, neuroscience, physics) or a matter of perspective (inside story, outside story).