U.N. Secretary General Ban Ki-moon delivered a full-throated, and thinly veiled, broadside against a host of world leaders from Syria’s President Bashar al-Assad to South Sudan’s Salva Kiir Mayardit during his tenth and final speech at the U.N. General Assembly.“In too many places, we see leaders rewriting constitutions, manipulating elections and taking other desperate steps to cling to power,” he said. “My message to all is clear: serve your people. Do not subvert democracy; do not pilfer your country’s resources; do not imprison and torture your critics.”