A Theory of Human Motivation A. H. Maslow (1943) Originally Published in Psychological Review, 50, 370-396. "7. Human needs arrange themselves in hierarchies of pre-potency. That is to say, the appearance of one need usually rests on the prior satisfaction of another, more pre-potent need. Man is a perpetually wanting animal. Also no need or drive can be treated as if it were isolated or discrete; every drive is related to the state of satisfaction or dissatisfaction of other drives. " "9. Classifications of motivations must be based upon goals rather than upon instigating drives or motivated behavior. " "13. Motivation theory is not synonymous with behavior theory. The motivations are only one class of determinants of behavior. While behavior is almost always motivated, it is also almost always biologically, culturally and situationally determined as well." "Thus man is a perpetually wanting animal."