Watch how people argue. Anyone who fights dirty over pizza toppings will fight dirty over things that matter.

How somebody fights over something small is how they fight, full stop. The stakes change, the style does not. If a person mocks, brings up old grudges or goes for the weak spot over what to order, that is their default setting, and a real disagreement only turns the volume up.

Pay attention during the low stakes arguments this week, the ones about seating or music or who owes five dollars. You are learning who stays fair when they are annoyed. Keep that in mind before you hand anyone something that would actually hurt to lose.