Agon

agon \AH-gahn; ah-GOHN\, noun:
A struggle or contest; conflict; especially between the protagonist and antagonist in a literary work.

Conflicts about moral claims are part of what it means to be human, and a political ideal stripped of sentimentality and the utopian temptation is one committed to the notion that political life is a permanent agon between clashing, even incompatible goods.
-- Jean Bethke Elshtain, Real Politics