This is where it all began (see below): something so simple that changed the world.

Yes, this is what Freud said: that the symptoms of neurosis originated in the "sexual needs of unsatisfied people." And that the repression of sexual life was not separate from our "civilized sexual morality."

From this statement, the sexual revolution originated, as well as a rebellion against civilization and culture.

What's more, the Freudian revolution was a also mental health movement. Freud was suggesting that if sexual desires were not so severely repressed, we would be happier; that we could achieve greater satisfaction from our human existence. 

Richard Koenigsberg 

History of Civilization: Volume I:
Freud and the Sexual Revolution

“The symptoms of neurosis originate in the sexual needs of
unsatisfied people. The injurious influence of culture reduces
itself to the undue suppression of the sexual life. We may thus
well raise the question whether our civilized’ sexual morality
is worth the sacrifice which it imposes upon us”
(Sigmund Freud, 1908).