One point there is on which the Machiavellian or practical politicians are particularly fond of talking nonsense, and that is the state's loyalty to treaties. Is the state bound by a treaty? Must it honour its signature? Must it perform what it has undertaken to do? The detestable, unanimous answer is "No. A treaty cannot hinder the state from doing what its interest demands." Prince Bismarck is often cited on this point, as he once said: "The only sound foundation for the state is state egoism." And another time: "A treaty is only valid _rebus sic stantibus_, if the situation is the same as when it was concluded; if the circumstances change, it becomes invalid by the very fact." Such views are revolting, however great a name be appended to them. Contract, or treaty, is the basis of the law. Whoever breaks it is dishonoured, and doubly dishonoured is he who from the beginning enters upon it with the idea at the back of his mind of deriving every possible advantage from it and of breaking it when the time comes to fulfil obligations.
The phrase, "sound egoism," whether it refer to a private person or to the state, must make every decent man blush for shame. Egoism may be sound, but it is always the contrary of moral. It is just as convenient for the individual as for the state to think only of his own advantage and unhesitatingly to sacrifice his neighbour's rights to it; but Morality arose and was constituted a rule of human relations in order to break the back of this selfishness and to teach man consideration for his neighbour. It is no valid excuse to say that state egoism is no sin, but a virtue and a merit, that it is different in character from the egoism of the individual. That is not true. It is not different in character. It is of exactly the same character as in private life. The responsible leader of the state who is guilty of a breach of treaty makes believe to himself and others that he does not do it for his own sake, but in the interests of the state. But who is the state? I have already given the answer to this. The state consists of men, the interests served by a breach of treaty are those of men, not, as a rule, of all, not even of many members of the state, but of a few, of a class, a group, perhaps of only one family whose power, wealth and reputation it is intended to increase. So-called state egoism is in actual fact the private egoism of many individuals, who break the law, or tolerate and condone a breach of the law, for the sake of pocketing ill-gotten gains; and no one is so stupid as to let himself be bamboozled into believing that the shameful crime of breaking a treaty for the purpose of "sound" egoistic grabbing becomes moral when it is perpetrated not by one individual but by thousands or millions of individuals.