The U.S. withdrawal from Afghanistan has already been vindicated by history. Amid the highs and lows of Joe Biden’s presidency, one achievement stands out for both its importance and the lack of appreciation it has received. In August 2021, 20 years after U.S. troops first stepped foot in Afghanistan — and long after America’s vital national interests there had disappeared — Biden finally brought them home. Of all his foreign policy decisions, few brought Biden more grief than the U.S.