Freedom of expression is the ultimate test of totalitarianism. Totalitarianism begins in the psyche of the extremists. Then it appears in the willingness to take away people’s freedoms. It appears in contradictions and untruths. But the opposition to free speech is what ultimately exposes totalitarianism beyond any doubt.

https://brownstone.org/articles/jordan-peterson-against-the-spirit-of-totalitarianism/