Modern nations must, as a practical matter, issue their citizen-soldiers weapons that are suitable for modern warfare. Machiavelli pointed out this problem with respect to mercenaries. School clubs often include Bible study and similar activities in which interested students can participate voluntarily. For it, e.g. Hillary Clinton's national health care plan Social Security Wants participation to be optional. For private retirement accounts.
Libertarians are good guys and coercive collectivists are bad guys.
Note that certain issues like gun control are good litmus tests of whether a politician is a libertarian or a coercive collectivist. Note that the Clinton Democrats also support things like socialized medicine and mandatory participation in Social Security. The story is set in the year 2065, and the world's only government is the Aerial Board of Control. Transportation is Civilization, our motto runs. The story refers to the bad old days in which coercive collectivism was the source of war and a myriad of social problems.