Therefore, anyone who isn't a Reasonable C is an Enemy and must be dealt with by using power.

I am a Not-C

(actually the joke comes from SJWs calling people like us, nazis... but we here it wrong, they are calling us Not-Communists, or Not-Cs for short)

Now the solutions are quite obvious... :-p

What will happen are several things we do not expect.

1st, we are going to start recognizing psyschopaths and understanding that you always get bad (or worse) when you include a narcissist. A narcissist will not be able to run for any office. And it will be because EVERYONE recognizes them, or enough to boot them from even running.

2nd, we are going to start learning that peaceful, win-win negotiations end up better.
War →1 + 1 = zero
win-lose → 1 + 1 = 1
win-win → 1 + 1 = 4

And so, it will become the thing to teach all children to negotiate. (see Stephan Molyneux for the beginnings of this)

3rd, defense will become hella easier then offense.
In example. Defense drone $10. A brick tied to a balloon that just gets in the way. Offense drone $1,000,000 has to be fuelled and piloted to deliver a tiny payload at great expense. (does very poorly if it runs into a brick in mid air)

4th, "families" (kinda what we call tribes) will be the basis of societal structure. Each family will be pretty much self sufficient and produce at least one tradeable commodity. Its kinda hard to hold a group financially hostage when they are self sufficient.

5th, free energy. Well, renewable, continuous, small community sized energy devices. (and water)

So, basically we will see the rise of rational people and a decrease of surfaces a govern-cement could get a hold of any person.

Then govern-cements become a whole different animal.
Things that are created for a single, measurable, task and then discarded.

(oh yes, between now and then is a lot of civil war, civil unrest, civil-starving to death, civil conflict, civil diseases... But peace on earth is not much more than two generations away.