Thomas Sowell’s Conflict of Visions was published 21 years ago and re-released last year, and at National Review, in a series of five short video interviews, Sowell discusses the “constrained” and “unconstrained” visions that inform conservative and liberal ideas, respectively. In Chapter 1 (of 5), Sowell describes the concept of vision, which we might consider something like worldview or set of presuppositions about the world. In Chapter 2, Sowell explains the difference between constrained and unconstrained visions. In Chapter 3, “Sowell says the constrained vision is never surprised by war, while the unconstrained vision almost always is.” In Chapter 4, Sowell explains how these “visions” see economic issues. And in Chapter 5, Sowell discusses what he considers the dangers of the “unconstrained vision.”