Zohran Mamdani has been sworn in as New York City's 112th mayor, marking historic firsts as the city's first Muslim, first South Asian, and youngest mayor. His victory, fueled by concerns over the high cost of living, promises an ambitious socio-economic agenda including universal childcare, state-owned grocery stores, and affordable housing. Mamdani's ability to deliver on these expectations will be closely observed both domestically and internationally.