Ballot box voting is often considered the essence of political freedom. But it has two major shortcomings: individual voters have little chance of making a difference, and they also face strong incentives to remain ignorant about the issues at stake. "Voting with your feet", however, avoids both of these pitfalls and offers a wider range of choices. In Free to Move, Ilya Somin explains how broadening opportunities for foot voting can greatly enhance political liberty for millions of people around the world.

People can vote with their feet through international migration, by choosing where to live within a federal system, and by making decisions in the private sector. These three types of foot voting are rarely considered together, but Somin explains how they have important common virtues and can be mutually reinforcing. He contends that all forms of foot voting should be expanded and shows how both domestic constitutions and international law can be structured to increase opportunities for foot voting while mitigating possible downsides.