The Art of Rhetoric, a guide on the principles behind oratorical skill, is a core text on the art of persuasion. Aristotle contends that rhetoric is one of the key elements of philosophy – along with logic and dialectic. The work consists of three books: the first is a general overview, the second concerns the means of persuasion that an orator must deploy, and the third discusses elements of style and arrangement.

Adam Smith (1723-1790) was a Scottish social philosopher and a pioneer of political economy. One of the key figures of the Scottish Enlightenment, Smith is the author of The Theory of Moral Sentiments and The Wealth of Nations, his magnum opus and the first modern work of economics. It earned him an enormous reputation and would become one of the most influential works on economics ever published. Smith is widely cited as the father of modern economics and capitalism. Smith studied social philosophy at the University of Glasgow and the University of Oxford.

Rousseau's Social Contract remains, after a quarter of a millennium, one of the most controversial texts in the history of political philosophy, variously seen as a model for participatory democracy, a blueprint for totalitarianism, and several points in between. In addition to Rousseau’s magnum opus, this production includes an introduction by George Douglas Howard Cole, an English political theorist, economist, writer and historian. Also included are three discourses that Rousseau composed apart from The Social Contract.

As intriguing today as when it was first published, Hume's An Enquiry Concerning Human Understanding is a fascinating exploration into the nature of human knowledge. Using billiard balls, candles, and other colorful examples, Hume conveys the core of his empiricism - that true knowledge can be gained only through sensory experience.

Often considered the foundation of political liberalism, John Locke's Two Treatises of Government was first published anonymously in 1689, in the wake of England's Glorious Revolution. In The First Treatise of Government, Locke refutes the idea of divine monarchy, while The Second Treatise of Government articulates Locke's philosophy of government, which he based upon his theories of natural rights and the social contract.