Urjit Patel's new book, 'The Great Sanctions Hack,' argues that economic sanctions have become the primary tool of global coercion, surpassing tariffs and military action. Patel, former RBI governor, details how nations are weaponizing financial systems and logistics chains, a realization spurred by the Russia-Ukraine conflict. He describes this as an 'era of economic siege' where powerful countries reprogram global systems for influence through banking rules and secondary sanctions, a 'silent war of spreadsheets'.