His impact is not as large on the world as you want to believe.
On the contrary, Freud's theories have had a much greater impact on the world than you want to believe. Before Freud ideas on sexuality were almost verboten. The whole theory that every person has a sexual and aggresive drive was very new and very controversial. Also the theories about the unconscious and that neuroses arise from the unconscious mind has been very revolutionary. Instead of being considered a neurological disease (remember Freud was a neurologist as well), it was shown that it was a mental disease and could be cured.
Because of Freud we know more about how the mind works and why we act the way we do than if we had continued on the path neurology was going at the time.
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