Q:

Preventing edit wars

There's an edit war going on in Smart Tic Tac Toe, a reinforcement learning approach . Every edit by one high-rep user is being reverted by the OP with no explanation, and he (sigh) offers this:

keep editing my post and I'll keep rolling it back and let's see who gives up first. You do not own the website, you're just a user like any of the other users, if the website allows you to edit my post, it also allows me of rolling back your edits, if you have suggestions, you come here with a comment requesting my approval and I decide what I want to include in my post and what I do not, it's not up to you to decide, wanna make it a challenge? go ahead and I will win whether you like it or not.

Though the following editorializing on my behalf is bordering on a self-answer,

if you have suggestions, you come here with a comment requesting my approval

That is not remotely the accepted model for edits. Editors do not (and should not, for efficiency's sake) seek approval from the OP beforehand. This community relies on mutual trust, including trust that users with enough rep to make edits understand the guidelines enough to be able to make constructive edits without first asking for permission. That is certainly the case here, though said trust from the OP seems lacking.
If there were a mechanism (?) to impose an edit freeze while discussion happens, I'd vote for that, but I don't know that there is one. What do we do?

A:

If there were a mechanism (?) to impose an edit freeze while discussion happens, I'd vote for that, but I don't know that there is one.

Actually... there is a mechanism for that. It's just not available to regular users. For cases where edits keep getting applied back and forth, diamond moderators have the ability to lock a post.
Before this happens it can be useful to communicate why certain edits are applied, either through the edit summary (which is somewhat unintuitive, especially for new users), or through comments.
If this resolves the edit dispute without moderator involvement comments pertaining to the dispute can be flagged as obsolete.
When in doubt, please do flag the relevant post for moderator attention and give some context as to what's happening in the flag message :)

A:

Users that are new to the network may not intuitively understand that they do not own any of the content they post on Stack Exchange, as per terms of service all user content is licensed under CC-BY-SA, and as content hosted on the SE network it is the duty of network users to make sure all network content looks great and reads well, and this is incentivized in several ways by the SE system itself, via reputation bonuses (+2 for an accepted edit suggestion), various badges and awards, and user rankings.
To be perfectly clear: the edits made are absolutely 1) warranted, 2) appropriate, and 3) necessary.
I've reinstated the legitimate edit. Such knee-jerk rollbacks are completely unjustified, but for the record this whole episode was never auto-flagged as an actual edit war.
As for preventing edit wars, we can't. There will always be users that are over-protective of "their" content and make wrong assumptions about others' intentions. What we can do is:

Flag the post for moderator intervention: moderator will review edit history, assess the situation, and take the appropriate decision, including rolling back, further editing, and/or locking the post for content dispute.
Respectfully educate newer users: let's face it, nobody reads the rulebook; most of us simply walk into Stack Exchange and accept whatever the rules are and go with the flow - those that walk into SE with apprehensions and assumptions about its communities and the motivations of its users, tend to have it a bit harder: these are the users we need to be tactful and patient with; a one-on-one chat conversation is likely the best way to do this (post comments only get you so far, and they're noisy). Avoid confrontational wording, and try to de-escalate any ad-hominem and insults - better to walk away than escalate, someone else can do this if you're getting too hot-headed right now. Use chat flags as appropriate.

