The necessary consequence of man's right to life is his right to self-defense. In a civilized society, force may be used only in retaliation and only against those who initiate its use. All the reasons which make the initiation of physical force an evil, make the retaliatory use of physical force a moral imperative. If some "pacifist" society renounced the retaliatory use of force, it would be left helplessly at the mercy of the first thug who decided to be immoral. Such a society would achieve the opposite of its intention: instead of abolishing evil, it would encourage and reward it.
Ayn RandYou don't love causes. You don't love everybody indiscriminately. You love only those who deserve it.
Ayn RandThe smallest minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities.
Ayn Rand