Ten years ago, Indian economist and politician Jairam Ramesh coined a word that captivated pundits and investors: "Chindia." The idea that China and India might join forces, to cooperate as much as they compete, was both seductive and fleeting. Observers were heartened by promises from then-Chinese President Hu Jintao and Indian Prime Minister Manmohan Singh to enact sweeping internal reforms and embrace regional cooperation -- neither of which happened. The leaders of the world's most populous nations turned inward. Their domestic problems festered.