A loving father may report his own son to the police in an effort to prevent the son from committing murder, illustrating justified interference to prevent irreparable harm to another.

Consider now the two conditions under which we humans typically feel justified in interfering with the freedom of others (see Talbott 1990a, 38). We feel justified, on the one hand, in preventing one person from doing irreparable harm—or more accurately, harm that no human being can repair—to another; a loving father may thus report his own son to the police in an effort to prevent the son from committing murder. We also feel justified, on the other hand, in preventing our loved ones from doing irreparable harm to themselves; a loving father may thus physically overpower his daughter in an eff...