Here, in a nutshell, is an explanation for great power competition. Societal advancement requires step changes in productivity. Leaps in productivity require proximity to means of production. Production requires resources, and resources require access. Access is competitive. Competition breeds conflict, creates winners and losers, and fosters its own forms of advancement and innovation - often at terrible humanitarian short term costs.
Nevertheless, being a winner ultimately means your society persists (Great Britain), and being a loser means your society expires (Roman Empire).