Constant vigilance

Tocqueville's words (from Democracy in America) are just as true in a post-Heller world as they were in the 1830s:

It is above all in the present democratic age that the true friends of liberty and human grandeur must remain constantly vigilant and ready to prevent the social power from lightly sacrificing the particular rights of a few individuals to the general execution of its designs. In such times there is no citizen so obscure that it is not very dangerous to allow him to be oppressed, and there are no individual rights so unimportant that they can be sacrificed to arbitrariness with impunity.