I’ve thought a bit more about what I wrote yesterday, and I didn’t address a common libertarian response to the sort of objection that I made. This response involves saying, “of course I’m not against [PICK ONE: protecting the planet from asteroids/ stopping the spread of aids/ giving food to the poor/ any other obviously desirable thing], I just don’t think that the government should have a role in doing it. Individuals should take responsibility for accomplishing these things through voluntary action.”

Maybe in libertopia private actors would have built a huge anti-asteroid missile defense system whose construction involved no rights violations (I’m skeptical), but in our world it is states alone that have the capacity to address this sort of problem. Given our current circumstances, the correct way of thinking isn’t to say, “if we can’t have asteroid protection without coercive state action, then I guess we’ll just have to accept that we’ll get hit by asteroids”. Instead, we should recognize that the state has a moral duty to protect us from asteroids (and prevent the spread of diseases, and feed the hungry) because moral duties in an ideal world aren’t necessarily identical to moral duties in our own very non-ideal world.

We live in a world with large, non-libertarian governments. Among the many non-libertarian things these governments commonly do are the obviously good things I listed above. It’s not clear how we get to libertopia from where we are now, and if government suddenly just didn’t do any of these things, then the consequences would be terrible. This is why the typical libertarian response doesn’t work: because even if states have power that can’t be morally justified, in our current social political context it is the state alone that has the capacity to prevent a lot of suffering.