Immanuel Kant's "Perpetual Peace: A Philosophical Sketch"
Read this article, tracing how Kant outlines what would be required to establish the conditions for a worldwide perpetual peace to exist and sustain. For Kant, the establishment of something akin to a world government presumes an idea of history and the notion of humanity as a work in progress.
Click http://web.archive.org/web/20160415165314/https://www.mtholyoke.edu/acad/intrel/kant/kant1.htm link to open resource.