“You have to make your voice heard!” – so the exhortation goes, though the remainder of the sentence usually goes unsaid: “… on the issue that at the moment I think to be the most important.” Nobody thinks you have to make your voice heard about everything all the time, which in any case would be impossible. The same unspoken addendum fits onto “Silence is violence.” All these exhortations have the same essential meaning: If you do not care about what I care about in the way t...