Today we celebrate one of the world’s least notable anniversaries: the 84th year since the signing of the Kellogg-Briand Pact, which outlawed war for the better part of the past century and won its authors the Nobel Peace Prize. This immodest treaty aimed at nothing less than permanent elimination of war as an instrument of national policy and remains on the books to this day. A quick review of 20th century history is the clearest testament to its lasting effectiveness.Although modern do-gooders and green activists have no shortage of poorly concieved global treaties of their own, the Kellog-Briand Pact remains the gold standard for the overreach of good intentions.Over at his CFR blog, James Lindsay has a good overview of the origins of one of the worst policy ideas in American history. Understanding what can and can’t be accomplished through international agreements and treaties is an indispensable qualification for successful leadership in foreign affairs. Unfortunately, many people find this a hard concept to grasp, as a result of which vast amounts of energy continue to be wasted on utopian quests and unicorn hunts.