Hilaire Belloc, The Servile State (Indianapolis: Liberty Fund, 1977). written in 1913, Belloc's quirky but resonant thesis is that monopolistic capitalism, backed by the power of the state, inevitably leads to a return to serfdom.
F.A. Hayek, The Road to Serfdom (Chicago: University of Chicago Press, 1944). Hayek picks up the theme: state planning and collectivism lead to the destruction of freedom.
The Capitalism FAQ: "There is no social system more rational, benevolent, or just than laissez-faire capitalism; no social system which can bring to man as much freedom, prosperity, and peace as laissez-faire capitalism; and ironically, even with socialism in its deathrows all over the world, there is no social system which is more condemned and misunderstood than laissez-faire capitalism."
The Truth About American Capitalism: " If nothing else, we should at least recognize capitalism for what it is - a predatory economic system based on greed and selfishness..."
The Trouble with Capitalism, or How I Stopped Worrying and Learned to Love Socialism: "There is no necessary limit to how desperate or how greedy people will become, when sufficiently motivated. And capitalism has no inherent restraint on how much motivation gets inflicted on people."
Conservative Values Versus Corporate Values: "Much as I dislike Pat Buchanan, there is one issue where I am in agreement with him: opposition to free trade and unfettered free-market capitalism."