" Students of the theory of ethics call only those acts "good" which are the expression of good impulses and refuse to acknowledge others as such. But society is on the whole guided by practical aims and does not bother about this distinction; it is satisfied if a man adapts his conduct and his actions to the precepts of civilization and asks little about his motives.

We have heard that the outer compulsion which education and environment exercise upon a man brings about a further transformation of his impulse life for the good, the change from egotism to altruism. But this is not the necessary or regular effect of the outer compulsion. Education and environment have not only love premiums to offer but work with profit premiums of another sort, namely rewards and punishments. They can therefore bring it about that a person subject to their influence decides in favor of good conduct in the civilized sense without any ennobling of impulse or change from egotistic into altruistic inclinations. On the whole the consequence remains the same; only special circumstances will reveal whether the one person is always good because his impulses compel him to be so while another person is good only in so far as this civilized behavior is of advantage to his selfish purposes. But our superficial knowledge of the individual gives us no means of distinguishing the two cases, and we shall certainly be misled by our optimism into greatly over-estimating the number of people who have been transformed by civilization.

Civilized society, which demands good conduct and does not bother about the impulse on which it is based, has thus won over a great many people to civilized obedience who do not thereby follow their own natures. Encouraged by this success, society has permitted itself to be misled into putting the ethical demands as high as possible, thereby forcing its members to move still further from their emotional dispositions. A continual emotional suppression is imposed upon them, the strain of which is indicated by the appearance of the most remarkable reactions and compensations.

In the field of sexuality, where such suppression is most difficult to carry out, it results in reactions known as neurotic ailments. In other fields the pressure of civilization shows no pathological results but manifests itself in distorted characters and in the constant readiness of the inhibited impulses to enforce their gratification at any fitting opportunity. "

― Sigmund Freud , Reflections on War and Death