Libertarianism isn't defined as not following moral rules, or having no responsibility for anyone else.
Even anarchism doesn't mean that.
Libertarianism covers a lot of specific ideas, but its general point is limited government. Not no government, and certainly not no moral considerations or no attempt to take care of people besides yourself.
Anarchism means belief in having no government, but it doesn't mean that you can't have moral rules or feelings of responsibility to others.
As for "possession by might rather than right", well libertarians tend to be strong supporters of property rights, and anarchocapitalists also support such rights. Some other anarchist subsets might not, but now your not just dealing with a minority (like libertarians), or a tiny minority (like anarchists), but a subset of the tiny minority.
Stirner may have been an anarchist, and believe in no responsibilities or moral rules, but he's just one individual, and not one that has wide spread support either in society in general, or among those wanting smaller government. |
