There is only one institution that can arrogate to itself the power legally to trade by means of rubber checks: the government. And it is the only institution that can mortgage your future without your knowledge or consent: government securities (and paper money) are promissory notes on future tax receipts, i.e., on your future production.
Ayn RandThe 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 Rand