Of course we'd still have to come up with activities to occupy all the "guard dog" will-to-power types when they no longer had good excuse to brutalize unfortunates. My suggestion would be a new violent sport! Since physical fitness is on the wane, probably something incorporating motorized scooters?
That's probably socialized, but maybe theres some animal hunger underneath it.
There are just so many examples of predictable human irrationality attributable to this that it's hard to believe anyone doesn't understand it.
We keep executing our adaptations thousands of years after they cease to be useful.
More to the point, we didn't evolve in an environment that included police. Police were invented in the 19th century (for largely questionable purposes such as racism and anti-unionism). For hundreds of millennia before that, we survived without them. It's true that there existed various forces of "authority" over that period, but these were concerned about people taking the authority's shit. A cursory familiarity with history and archaeology convinces one that "coercive and alienating forces" rarely prioritize the interests of the general public.
Easy example of this would be Cohortes Urbanae in ancient Rome which was specifically formed because the Praetorian Guard was too corrupt even by Roman standards at the time and mobs, gangs and 'random' violence were common.
This is how fearful people fool themselves. They paint over the authoritarian excess of the past with anachronistic illusions of the present. Instead, they should realize that the unmistakable evils of authoritarians past indict those of the present, even if we tell ourselves that it's different this time.