Brahma Chellaney is a geostrategist and author of nine books, including "Asian Juggernaut: The Rise of China, India and Japan."
Nearly five years after it was resurrected from a decadelong dormancy, and then integrated as a strategic coalition of the Indo-Pacific's leading democracies, the Quad is struggling to make a difference in a region whose rising economic and geopolitical heft promises to reshape the international order.
