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I am a Freudian behaviorist. Freud, much like Einstean, is misinterpreted by the marginally knowledgable to suit their own purposes. Einstein talked about relativity in the world of physics. People took the terms and brought them into philosophy and morality to declare those areas to be relative and arbitrary. They are not. Freud's views on sexuality have continued to evole over the years within the thinking analytic movement. Many of his original concepts were rather valid. How they are applied by amateurs and dishonest opportunists is a separate matter for which Freud can not be blamed.
But it's not just a question of Freud's ideas being cheapened or distorted or misapplied by his followers. In many ways, some of his successors have improved very much on his insights. And in some ways, Freud had as much of a crackpot or propagandist or charlatan in him as some of those who followed, as his work with cocaine, biorhythmic theories, historical speculations, and some disastrous therapeutic interpretations and interventions might indicate.
Current scientists are putting Freud into perspective, sorting out the positive from the negative sides of his work, and the useful from the blind alleys. I don't think one can blame Freud for the discovery of sex or the use of it as marketing gimmick. Simple experience accounts for that. But Freud did much to add to the level of cynicism of 20th century humanity.