As libertarians, we believe that people have the right of self-ownership and property. If we have these rights, it’s obvious that we have the right to defend these rights by using force against attempts to take them away from us. As the great Murray Rothbard says in The Ethics of Liberty: “If, as libertarians believe, every individual has the right to own his person and property, it then follows that he has the right to employ violence to defend himself against the violence of criminal aggressor...