Ask anyone what makes a relationship work and you will hear about the other person. Kind. Funny. Ambitious. The right type.
Somebody checked whether any of that predicts anything.
Sources
Joel S, Eastwick PW et al. (2020) — Machine learning uncovers the most robust self-report predictors of relationship quality across 43 longitudinal couples studies, PNAS. 43 datasets, 29 laboratories, more than 11,000 couples