No true seeker of truth can oppose the fully free marketplace of ideas. For details of the hardheaded practical case, you can do no better than to consult chapter 2 of John Stuart Mill’s On Liberty. If you can’t spare the time to read this short chapter and book, here’s the money quote: “He who knows only his own side of the case, knows little of that.”
Who Needs What?
"[I]t is evident ... that the man, who first made himself clothes and built himself a cabin, supplied himself with things which he did not much want, since he had lived without them till then; and why should he not have been able to support in his riper years, the...