In January, Canadian Prime Minister Mark Carney warned leaders gathered at the World Economic Forum in Davos that states caught between Washington and Beijing needed to stop negotiating alone. “If we’re not at the table,” he said, “we’re on the menu.” The line captured the mood of the moment. Across capitals and conferences, middle powers are suddenly back in fashion. Think tank reports and newspaper columns describe India as a pivotal swing state; hold up Brazil, Indonesia, Saudi Arabia, and