A lot of conflict can be explained in terms of differing tolerance levels. A disagreement may simply be a matter of one person hitting their limit before another.
An example will help: let’s say a couple is fighting because he feels like he always has to clean up her mess around the house. It would be easy to label her as a slob and/or him as a clean freak, but maybe they just have different levels of tolerance for messes.
Let’s say he can tolerate four dirty dishes before cleaning up, while she can tolerate five. They agree on most things: too many dirty dishes are bad, cleaning up after one dish is a waste of time, etc. They have no fundamental disagreement. Yet, that one-dish difference will result in him cleaning up every time, simply because his four-dish limit gets hit first. That can lead to other conflicts, such as unequal division of labour, questioning compatibility, failure to communicate, etc. All because of one very small difference in tolerance.
How does this help us resolve conflict? On one hand, it can help foster understanding of different points of view. Many conflicts are not between people on different sides of a line, but rather different distances from the same side of the line. It’s worth noting that most people don’t choose their limits; they are born with them, or they had them instilled early on, or they believe they are rational. Sometimes the resolution to a conflict can be as easy as “ok, your limit is here, my limit is here, and that’s okay.”
On the other hand, living with other humans often necessitates adjusting our tolerance levels. Things run smoother if our limits are close. In the example above, if she dropped her tolerance to four dishes 50% of the time, each of them clean up half the time, and they live happily ever after. Sometimes it’ll have to go the other way too: if he’s not too ragey with disgust after four dishes, he could wait until five, then she hits her limit and naturally cleans up. Either way, hooray for compromise.
This may be a subtle point, but I think it’s a good one: many disagreements are not disagreements at all. It’s not that one person is wrong and the other is right. They’re just feeling different things based on how close they are to their limit. That is much easier to deal with than genuine conflict, especially if it’s recognized as the non-conflict (nonflict) it is.