> the rule of law" is the only thing holding together your country, my country, everyone's countries, and civilized society in general. Take that away, and everything around us will collapse, regressing the few survivors of that event to the prehistorical lifestyle of small tribes slaughtering each other

I've seen this sentiment expressed before, including with the movie "The Purge" (that I admittedly haven't seen, but I understood the concept as law becomes suspended for a day and everyone becomes violent). That idea that the only thing keeping people safe is the rule of law seems absurd to me.

There's a sense of empathy, there's religion (e.g. desire of heaven and fear of hell), there are family values (keeping extended family ties together which can induce pressure to do what's considered right), a concern over reputation, a sense of unity with one's culture and wanting the betterment of one's people, collectivism (the psychological/social tendency to put others before oneself), stuff like not wanting to bring shame to one's parents and extended family, a hate for hypocrisy, a simple lack of any desire to be violent, etc. etc.

I like to believe that between most people and their potential for violence, there's a lot of things besides the rule of law. Law enforcement is for outliers that have a desire for violence and nothing else to stop them.

If law enforcement would disappear from one day to the next, people would be less safe, but I don't think to the point that you'd have "few survivors of that event", especially if you consider just a single country/culture going through that experiment, since this probably depends somewhat on culture and its particular values. I'm more inclined to think that life would mostly just go on as normal, carried by habit/convention and the values we instill in offspring.