Agon

It was not ecological pressure or shortages of protein, as anthropologist Marvin Harris has claimed; institutionalized violence, as opposed to the stylized agons of hunters over grievances, was the shadow side of the Neolithic Revolution.

Source: wiktionary

One way of reading Beowulf is to think of it as three agons in the hero's life[.]

Source: wiktionary

The other ethical system is that of agon. Agon is a battlefield. We enter agon not to exchange, but to fight. We dream of winning but are also prepared to lose – including to lose ourselves, even in the literal sense of dying for a great cause.

Source: wiktionary

Freud's originality stemmed from his aggression and ambition in his agon with biology.

Source: wiktionary