This essay, puts forth a plan for a lasting peace between nations and peoples. Kant puts forth necessary means to any peace, and argues that nations can be brought into federation with one another without loss of sovereignty. In one translation, telling of the historical impact of this essay, this federation is called a “league of nations.” The supplements and appendices are of considerable interest on their own. The supplements contain an argument regarding the use which nature makes of war, and the way in which nature, in the end, impels us towards peace. The appendices return to the question of whether his theory is mere theory, or whether it bears translation into practice. In this, he distinguishes between the moral politician and the political moralist, pointing out ways in which practical considerations conceal and excuse behavior that leads us towards discord and war.