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President Barack Obama's proposed tilt of U.S. priorities toward the Pacific – and away from the historical link to Europe – represents one of the most encouraging aspects of his foreign policy. Although welcome, we should recognize that this shift comes about three decades too late and that it may miss the rising geopolitical centrality of sub-Saharan Africa and Latin America. The emergence of these longtime historically impoverished backwaters has been largely missed as American policy-makers and businesses now obsessed with the challenges and opportunities posed by the emergence of China and, to a lesser extent, India. Sub-Saharan Africa, for example, over the past decade has produced six of the world's 10 fastest-growing economies. From 2011-15, according to the...