IV. Next to subjects, and even upon an equal footing with them, as to claims of protection, are allies, a name including, in its consequences and effects, both those, who have formed a subordinate connection with another power, and those who have entered into engagements of mutual assistance. Yet no such compacts can bind either of the parties to the support or prosecution of unjust wars. And this is the reason, why the Lacedaemonians, before they went to war with the Athenians, left all their allies at liberty to decide for themselves upon the justice of the quarrel. To which an additional observation may be made, that no ally is bound to assist in the prosecution of schemes, which afford no possible prospect of a happy termination. For this would be defeating the very end of alliances, which are contracted from motives of public advantage, and not for a participation in ruin. But any power is obliged to defend an ally even against those, with whom it is already connected by subsisting treaties, provided those treaties contain no express condition prohibiting such defence. Thus the Athenians might have defended the Corcyraeans, IN A JUST CAUSE, even against the Corinthians, their more ancient allies. V. A third case is that, where assistance has not been expressly promised to a friendly power, and yet is due on the score of friendship, if it can be given without inconvenience. Upon this principle Abraham took arms in defence of his kinsman Lot: and the Romans charged the Antiates to commit no acts of piracy upon the Greeks, as being a people of the same kindred with the Italians. It was no unusual thing with the Romans to begin, or at least to threaten to begin wars not only in support of allies, to whom they were bound by treaty, but in support of any friendly powers. VI. The last and most extensive motive is the common tie of one COMMON NATURE, which alone is sufficient to oblige men to assist each other. VII. It is a question, whether one man is bound to protect another, or one people another people from injury and aggression. Plato thinks that the individual or state not defending another from intended violence is deserving of punishment. A case for which provision was made by the laws of the Egyptians. But in the first place it is certain that no one is bound to give assistance or protection, when it will be attended with evident danger. For a man's own life and property, and a state's own existence and preservation are either to the individual, or the state, objects of greater value and prior consideration than the welfare and security of other individuals or states. Nor will states or individuals be bound to risk their own safety, even when the aggrieved or oppressed party cannot be relieved but by the destruction of the invader or oppressor. For under some circumstances it is impossible successfully to oppose cruelty and oppression, the punishment of which must be left to the eternal judge of mankind.