"Perpetual Peace, a philosopical sketch"

Immanuel Kant: On Peace
1. A state of Peace among men who live side by side with each other, is not the natural state. The state of Nature is rather a state of War; for although it may not always present the outbreak of hostilities, it is nevertheless continually threatened with them. The state of Peace must, therefore, be established; for the mere cessation of hostilities furnishes no security against their recurrence.

2. The notion of a Right to go to war, cannot be properly conceived as an element in the Right of Nations. [...] If such a Right be conceivable at all it would amount, in fact, to this: that in the case of men who are so disposed it is quite right for them to destroy and devour each other, and thus to find Perpetual Peace only in the wide grave.

3. A State is not to be regarded as a property or patrimony, like the soil on which it may be settled. It is a society of men, over which no one but itself has the right to rule or to dispone. Like the stem of a tree it has its own root, and to incorporate it as a graft in another State, is to destroy its existence as a moral Person.

4. For of the three powers known in the State as the Power of the Army, the Power of external Alliance and the Power of Money, the money-power might well become the most reliable instrument of war, did not the difficulty of determining its real force stand in the way of its employment.

5. A war of extermination, in which the process of annihilation would strike at both parties, and likewise at all Right at the same time, would reach Perpetual Peace only on the final Golgotha of the human race. Such a war, therefore, as well as the use of such means as might lead to it, must be absolutely unallowable.

6. This Right of Hospitality as vested in strangers arriving in another State, does not extend further than the conditions of the possibility of entering into social intercourse with the inhabitants of the country. In this way distant continents may enter into peaceful relations with each other. These may at last become publicly regulated by law, and thus the human race may be always brought nearer to a Cosmo-political Constitution.

7. The social relations between the various Peoples of the world, in narrower or wider circles, have now advanced everywhere so far that a violation of Right in one place of the earth, is felt all over it.

8. That 'kings will philosophise or philosophers become kings,' is not to be expected. Nor indeed is it to be desired, because the possession of power inevitably corrupts the free judgment of reason. But kings or king-like nations, who govern themselves according to laws of equality, should not allow the philosophers as a class to disappear, or to be silenced; rather should they be allowed to speak forth their maxims publicly. Nay, this is even indispensable to both for the mutual enlightenment of their functions.

9. Reason would drive [states] to give up their savage lawless freedom, to accommodate themselves to public coercive laws, and thus to form an ever-growing State of Nations, such as would at last embrace all the Nations of the Earth. But as the Nations, according to their ideas of international Right, will not have such a positive rational system, and consequently reject in fact (in thesi) what is right in theory (in hypothesi), it cannot be realised in this pure form. Hence, instead of the positive idea of a Universal Republic-if all is not to be lost-we shall have as result only the negative surrogate of a Federation of the States averting war, subsisting in an external union, and always extending itself over the world.

10. [Standing armies] constantly threaten other nations with war by giving the appearance that they are prepared for it, which goads nations into competing with one another in the number of men under arms, and this practice knows no bounds. And since the costs related to maintaining peace will in this way finally become greater than those of a short war, standing armies are the cause of wars of aggression that are intended to end burdensome expenditures. Moreover, paying men to kill or be killed appears to use them as mere machines and tools in the hands of another (the nation), which is inconsistent with the rights of humanity.