As the world's emerging economies gather in New Delhi for the 18th BRICS Summit, Nigeria's formal admission as a partner country marks another quiet but consequential shift in the architecture of global power. Africa's largest economy joins a bloc that now speaks for nearly half of humanity and 40 percent of global output — a coalition built not on shared ideology but on a shared conviction that the institutions of the old order no longer reflect the world as it is. India, holding the chairmanship, faces the ancient challenge of turning collective aspiration into collective action.