It is not a man's duty, as a matter of course, to devote himself to
the eradication of any, even the most enormous wrong; he may still
properly have other concerns to engage him; but it is his duty, at
least, to wash his hands of it, and, if he gives it no thought
longer, not to give it practically his support. If I devote myself
to other pursuits and contemplations, I must first see, at least,
that I do not pursue them sitting upon another man's shoulders. I
must get off him first, that he may pursue his contemplations too.
-- Henry David Thoreau, Civil Disobedience
