The strength of a civilization is not measured by its ability to fight wars, but rather by its ability to prevent them.
Shown at the end of the episode "Scorched Earth", no. 14 in the 3rd season of Gene Roddenberry's Earth: Final Conflict, first aired on February 7, 2000. https://www.youtube.com/watch?v=fmNrtnKt46U at 7:43