History: Intellectual History 
Essential
The Tide in the Affairs of Men
By Milton Friedman and Rose D. Friedman: "The aim of this brief essay is to present a hypothesis that a major change in social and economic policy is preceded by a shift in the climate of intellectual opinion. The intellectual tide is spread to the public by all manner of intellectual retailers: teachers and preachers, journalists in print and on television, pundits and politicians. "
On Property and Government
By John Locke: "Though the earth, and all inferior creatures, be common to all men, yet every man has a property in his own person: this no body has any right to but himself."
The Liberty of Ancients Compared with that of Moderns
By Benjamin Constant: "The danger of modern liberty is that, absorbed in the enjoyment of our private independence, and in the pursuit of our particular interests, we should surrender our right to share in political power too easily."
Recommended
The Question of Monopolies
By Nathaniel Branden. A reader asks "In a society of laissez-faire capitalism, what would prevent the formation of powerful monopolies able to gain control over the entire economy?"
The Tradition of Spontaneous Order
By Norman Barry: It is not that the theory of spontaneous order precludes planning as such; it is that only planning by individuals in decentralized markets will tend towards an optimal use of knowledge. The central planner has only that knowledge available to him, which is less than that which is co-ordinated among all the agents in a market process. Furthermore, because the future is unknowable, a system that relies on liberty allows for the accidental and spontaneous.
Libertarianism: A Primer
David Boaz presents the essential guidebook to the libertarian perspective, detailing its roots, central tenets, solutions to contemporary policy dilemmas, and future in American politics. He confronts head-on the tough questions frequently posed to libertarians: What about inequality? Who protects the environment? What ties people together if they are essentially self interested? A concluding section, "Are you a Libertarian?" gives readers a chance to explore the substance of their own beliefs. Libertarianism is must reading for understanding one of the most exciting and hopeful movements of our time.