On the war on drugs, see my “Futility and the War on Drugs”:
On antitrust, there is an embarrassment of riches. To get a taste of the true history of antitrust, read “The Antitrust Economists’ Paradox.” For more, consult Dominick Armentano’s books Antitrust and Monopoly: Anatomy of a Policy Failure and Antitrust: The Case for Repeal. Or read any of these articles.
For a critique of the perfect competition model on which the logic of antitrust is based, see (among other sources) chapter XI of Milton Shapiro’s Foundations of the Market Price System (available online), chapter 10 of Murray N. Rothbard’s Man, Economy, and State: A Treatise on Economic Principles (available online), and George Reisman’s article “Platonic Competition.”
On Ron Paul’s views on the environment, see Murray N. Rothbard’s “Law, Property Rights, and Air Pollution.”
On health care, see Vijay Boyapati’s “What’s Really Wrong with the Healthcare Industry.”
On civil rights, see Thomas Sowell’s extraordinary book Civil Rights: Rhetoric or Reality?
On the census, here is Ron Paul in his own words.