If there be in nature such a principle as justice, it is necessarily the only political principle there ever was, or ever will be.  All the other so-called political principles, which men are in the habit of inventing, are not principles at all.  They are either the mere conceits of simpletons, who imagine they have discovered something better than truth, and justice, and universal law; or they are mere devices and pretences, to which selfish and knavish men resort as means to get fame, and power, and money.