How about an "arms limitation treaty" between the left and the right in the US? Both sides will give up most of their empirically unsupported, subjective, and intellectually dishonest tactics for muddying the waters and suppressing substantive debate. The left can give up trigger warnings while the right can stop denying climate science.
What we need in the US is a "Groupthink Potlatch." We should have a reality TV show alternative to the mainstream debates where two high profile contestants destroy their own side's intellectually dishonest bullshit. The winner is the one who gives away or destroys the most of their own side's intellectually dishonest bullshit.
https://en.wikipedia.org/wiki/Potlatch
(Is that cultural appropriation? Heh.)