A free market of ideas is a fantasy. Some statements are true and others are false. Nothing I know of guarantees that majority acceptance has any bearing on the truth or falsity of any proposition. Man is a social animal. Societies, by definition, operate on the basis of commonly acepted rules and shared beliefs. There are people who are born 'not quite right' and these folks become square pegs in society's round hole. We now know that when you gather all these side-show freaks together in the Democratic Party, they can muster just over 50% of the vote. Yes, Leftism can destroy any society. But a congeries of misfits can never create a functional society. Google "behavior-sink".