Should Vladimir Putin be studying the conviction of Charles Taylor, the former Liberian president? What about Henry Kissinger? The verdict marked the first time since the post–World War II Nuremberg trials that a former head of state has been convicted by an international tribunal of war crimes and crimes against humanity. What may be of more lasting significance, however, is that Taylor was not convicted for oppressing his own people—though he did that as well—but for his material support to abusive forces in another country. In that respect, the decision speaks not just to tinpot dictators but to leaders of countries who fight proxy wars by knowingly giving client states or rebel allies the means to commit atrocities.