Western Europe is more densely populated than Africa, Latin America, and China. Free trade and free immigration are terms that identify two aspects of personal freedom. Someone who is free need not have permission from the government to buy and sell from any consenting person in the world, and he need not have permission from government to move to another region of the world. The people who say they believe in freedom but who reject free trade and free immigration mistakenly believe that those freedoms are not entailed in the general notion of freedom and that they would violate the freedom of others. We have shown that those arguments are in error.
Freedom is indivisible because the lives of human beings are, in an important sense, indivisible.
To live well, a person must be able to plan and act with reference to all aspects of his life throughout his life span. Part of the value of freedom is that it gives people the flexibility to grapple with uncertainty. If the government interferes with decisions about from whom one buys products or where one moves, it interferes fundamentally with how people may plan and live their lives. Trade and immigration controls are thus pernicious infringements on the right to life, liberty, and the pursuit of happiness.