Q. Who is the world's first city

Determining the "world's first city" depends on how "city" is defined—by population density, urban planning, administrative structures, or continuous settlement. Uruk in ancient Mesopotamia (modern-day Iraq) is often considered the world's first true city, emerging around 4000-3000 BCE with populations reaching 40,000-80,000 people, sophisticated architecture including the temple complexes and defensive walls, organized governance, and early writing systems (cuneiform). Other ancient contenders include Eridu (also Mesopotamia, possibly dating to 5400 BCE), Çatalhöyük in Anatolia (Turkey, 7500-5700 BCE), and Jericho in the Levant (inhabited since 9000 BCE), though these earlier settlements may be better classified as large villages or proto-urban settlements rather than fully developed cities with urban characteristics.

The emergence of cities marked humanity's transition from nomadic hunter-gatherer societies to settled agricultural civilizations, enabling specialization of labor, development of complex social hierarchies, technological innovation, and cultural achievements. In the Indian subcontinent, the Indus Valley Civilization's cities of Harappa and Mohenjo-daro (in present-day Pakistan, flourishing around 2600-1900 BCE) represented some of the world's earliest and most sophisticated urban centers with advanced drainage systems, grid-pattern streets, standardized brick construction, and apparent urban planning. While these ancient cities no longer exist as living settlements, their archaeological remains provide crucial insights into early urbanization. Understanding this deep history of human urbanization contextualizes modern cities like Delhi, Mumbai, and Chennai as continuations of humanity's millennia-long experiment in concentrated urban living, and reminds us that challenges like sanitation, governance, social inequality, and resource management have confronted city-dwellers throughout history.