Wallerstein:" The United States today is, I would say, one of the least stable political entities in the world-system... there is a major drop in the belief in the United States, and its president, by traditional U.S. allies abroad, and by the president's Commentary No. 345, Jan. 15, 2013"The Structural Crisis: Middle-Run Imponderables":  "Nuclear weapons are essentially defensive weapons and therefore reduce, not increase, the likelihood of interstate wars."