... or principal of nature. It is only a cultural construct that has been occasionally been enforced with limits in some societies in far western Eurasia. It exists to the extent that military power allows and the whims of political powers decide. Socrates only got so far - and as a Citizen of Athens he had more freedom of speech then anyone else at the time. It is a privilege provided by force of arms.
When I was a kid on the streets of Brooklyn - Watch GoodFellas I was in the background of the reality of that piece of fiction - you had to take personal responsibility for what you said and did. If someone didn't like it you could get a flat nose, or be spread over several large black plastic bags in the Fountain Ave Dump.
So to all of those who are busy screaming "FUCK YOU". Would you say that if you had to take personal responsibility for that? That old west "Thems fighting words"? Why yes you say, and after the second beating you'll be far more circumspect.
But - you don't have to take that beating for being a jerk, Western Military Power prevents it. Usually And, now, less and less.