I call it (forgive the lofty phrase) the arc of innovation—and many, many discoveries fall short along that arc.
If the arc of history does in fact bend towards justice, eventually amateurism will leave college sports once and for all.
In the words of the Dr. Martin Luther King Jr., “The arc of history is long, but it bends toward justice.”
late 14c., originally in reference to the sun's apparent motion in the sky, from Old French arc "bow, arch, vault" (12c.), from Latin arcus "a bow, arch," from PIE root *arku- "bowed, curved" (cf. Gothic arhvazna "arrow," Old English earh, Old Norse ör; also, via notion of "supple, flexible," Greek arkeuthos, Latvian ercis "juniper," Russian rakita, Czech rokyta, Serbo-Croatian rakita "brittle willow"). Electrical sense is from 1821.
1893, in the electrical sense, from arc (n.). Meaning "to move in an arc" attested by 1954. Related: Arced; arcing.
A curved line or segment of a circle.