Another question concerns us more closely now. What means does civilization make use of to hold in check the aggressiveness that opposes it, to make it harmless, perhaps to get rid of it? Some of these measures we have already come to know, though not yet the one that is apparently the most important. We can study it in the evolution of the individual. What happens in him to render his craving for aggression innocuous? Something very curious, that we should never have guessed and that yet seems simple enough. The aggressiveness is introjected, ‘internalized’; in fact, it is sent back where it came from, _i.e._ directed against the ego. It is there taken over by a part of the ego that distinguishes itself from the rest as a super-ego, and now, in the form of ‘conscience’, exercises the same propensity to harsh aggressiveness against the ego that the ego would have liked to enjoy against others. The tension between the strict super-ego and the subordinate ego we call the sense of guilt; it manifests itself as the need for punishment. Civilization therefore obtains the mastery over the dangerous love of aggression in individuals by enfeebling and disarming it and setting up an institution within their minds to keep watch over it, like a garrison in a conquered city. As to the origin of the sense of guilt, analysts have different views from those of the psychologists; nor is it easy for analysts to explain it either. First of all, when one asks how a sense of guilt arises in anyone, one is told something one cannot dispute: people feel guilty (pious people call it ‘sinful’) when they have done something they know to be ‘bad’. But then one sees how little this answer tells one. Perhaps after some hesitation one will add that a person who has not actually committed a bad act, but has merely become aware of the intention to do so, can also hold himself guilty; and then one will ask why in this case the intention is counted as equivalent to the deed. In both cases, however, one is presupposing that wickedness has already been recognized as reprehensible, as something that ought not to be put into execution. How is this judgement arrived at? One may reject the suggestion of an original—as one might say, natural—capacity for discriminating between good and evil. Evil is often not at all that which would injure or endanger the ego; on the contrary, it can also be something that it desires, that would give it pleasure. An extraneous influence is evidently at work; it is this that decides what is to be called good and bad. Since their own feelings would not have led men along the same path, they must have had a motive for obeying this extraneous influence. It is easy to discover this motive in man’s helplessness and dependence upon others; it can best be designated the dread of losing love. If he loses the love of others on whom he is dependent, he will forfeit also their protection against many dangers,