The Coalition Count

THE BELIEF

“If I feel jealous when my friend gets close to someone new, that proves I'm being replaced.”

THE DATA

Friendship jealousy is an alarm, not a verdict. Krems and colleagues found it fires at cues of possible replacement — even more than at actual time lost — and its function is to prompt friendship maintenance, not to report a fact. A sensitive alarm goes off for false positives too.

THE BELIEF

“When I feel like the third wheel, it means the other two are secretly against me.”

THE DATA

Simmel showed in 1908 that the two-against-one reading is built into the shape of a triad: any group of three makes coalitions structurally possible, so your brain scans for them. Detecting the possibility of a coalition is a property of the geometry, not evidence of one.

THE BELIEF

“My friend disappeared into their new relationship because I wasn't worth keeping.”

THE DATA

Dyadic withdrawal is one of the most replicated patterns in relationship research: as couples become more involved, their wider networks shrink — across people, life stages, and decades of data. It's what forming a couple does to a network, not a ranking of your worth.