In practice, free speech is easy to lose. Say we start with equal free speech for both sides of some spectrum. As some ideas from one spectrum take hold, they a

In practice, free speech is easy to lose. Say we start with equal free speech for both sides of some spectrum. As some ideas from one spectrum take hold, they are selected for. After a while, the ideas of one spectrum slightly overtake the ideas of another, then it's easy for that side to now try and silence the other side and lose that freedom of speech. It's kind of like that common saying that pure evil is the belief that there is nothing left to know. That's what losing free speech does. It's society thinking "our system right now is the best" and not bothering to try and improve things.