His theory is essentially an idea on how people are motivated. Does who he studied automatically invalidate the theory? I'm interested to know where this Nazi pure-race crap you are referring to came from. Maslow was a prominent personality theorist and one of the best-known American psychologists of the twentieth century. Skeptical of behaviorism and psychoanalysis, Maslow worked to develop a more expansive theory of human motivation, one that could accommodate the powerful influence of biology and the environment while honoring the human capacity for free will. It's a frame work to try to explain behavior. Is it simple, sure, does making it complicated make it better, nope. Saying something is complicated and therefore any attempts at understanding are fruitless is a good way to accomplish nothing. No excuse necessary or expected.