U.S. leadership in the global security system is not what it used to be. Ukraine is in turmoil while Washington does little but warn and plead. Libya remains chaotic while the violent detritus of its 2011 civil war destabilizes Africa and the Levant. China uses ancient claims to assert ownership of tiny islands and potentially valuable stretches of the open sea. Gulf states are apoplectic over American inaction on the horrific Syrian civil war and the beginning of detente between Washington and Iran. America’s arch enemy al-Qaida seems as influential and dangerous as ever, with franchises popping up faster than […]