Apology, Crito, and Phaedo of Socrates
The Communist Manifesto by Friedrich Engels and Karl Marx
Democracy in America — Volume 1 by Alexis de Tocqueville
Democracy in America — Volume 2 by Alexis de Tocqueville
The English Constitution by Walter Bagehot
The Federalist Papers by Alexander Hamilton, John Jay, and James Madison
Nature (the art whereby God hath made and governes the world) is by the art of man, as in many other things, so in this also imitated, that it can make an Artificial Animal.
Introductory -- Of the liberty of thought and discussion -- Of individuality, as one of the elements of well-being -- Of the limits to the authority of society over the individual -- Applications.
The Prince -- Description of the methods adopted by the Duke Valentino when murdering Vitellozzo Vitelli, Oliverotto da Fermo, the Signor Pagolo, and the Duke di Gravina Orsini -- The life of Castruccio Castracani of Lucca.
Reader, thou hast here the beginning and end of a discourse concerning government; what fate has otherwise disposed of the papers that should have filled up the middle, and were more than all the rest, it is not worth while to tell thee.
The Social Contract & Discourses by Jean-Jacques Rousseau
Socialism: Utopian and Scientific by Friedrich Engels