One of the concepts that has stuck with me from reading Thomas Sowell is the idea of the Constrained Vision versus the Unconstrained Vision. The constrained vision holds that humans are fallible and imperfect, and that this is not a fault of society but inherent in individuals. It also recognizes that scarcity is a fundamental feature of the world, and because of the limits of both the world and human nature, there are no permanent solutions to society’s problems — only tradeoffs.