The world now faces a challenge from a barbarism that is no less menacing than its three predecessors—and may even be more so. And in this new struggle, a post-9/11 America came—not a moment too soon—to appreciate the vital fact that India had been fighting bin-Ladenism (and had been its target) far longer than we had. That fact alone should have mandated a change of alignment away from the chronically unreliable Pakistani regime that had used the Taliban as its colonial proxy in Afghanistan. But it helped that India was also a polyethnic secular democracy with a largely English-speaking military, political, and commercial leadership. We’re only in the earliest stages of this new relationship, which so far depends largely on a nuclear agreement with New Delhi, and with the exception of Silicon Valley, the U.S. does not yet boast a politically active Indian population. But the future of American-Indian relations is crucial to our struggle against jihadism, as well as to our management of the balance of power with China.