Full Idea
Each nation, for the sake of its own security, can and ought to demand of the others that they should enter along with it into a constitution, similar to the civil one, within which the rights of each could be secured.
Gist of Idea
Each nation should, from self-interest, join an international security constitution
Source
Immanuel Kant (Perpetual Peace [1795], 2.2nd)
Book Reference
Kant,Immanuel: 'Political Writings', ed/tr. Reiss,Hans [CUP 1996], p.102
A Reaction
Not sure how close the United Nations takes us to this. You have to admire Kant for this one.