 Second, protecting and promoting normal functioning is not the only factor affecting the range of opportunities open to people. Income, education, and basic liberties, as well as other factors, do so as well. Nevertheless, the loss of functioning or premature death that may come with ill health clearly diminishes the range of plans of life people can reasonably choose among in a given society. Accordingly, protecting health protects opportunity, even if it is not the only thing that does so. A crucial feature of the argument is that we are concerned about the health of all because we are concerned about protecting the opportunity range of all.