Top 6 oldest nations in the world

Egypt: With a rich history dating back to around 6000 BCE, Egypt boasts some of the earliest evidence of centralized government, complex social structures, and monumental architecture like the pyramids. 

China: Chinese civilization can be traced back to around 5000 BCE, marked by the rise of early dynasties and advancements in agriculture, writing systems, and philosophy. 

Mesopotamia (present-day Iraq): This region, considered the cradle of civilization, saw the development of Sumerian city-states around 4500 BCE, laying the foundation for concepts like law, writing, and irrigation.

Greece: Although the modern Greek nation arose much later, evidence of ancient Greek civilization goes back to around 3000 BCE, characterized by the Minoan and Mycenaean cultures, known for their impressive architecture, maritime trade, and early forms of writing. 

India: Indus Valley Civilization flourished in the Indus Valley region (present-day Pakistan and India) around 3300 BCE, demonstrating advanced urban planning, sanitation systems, and craftwork. While the civilization eventually declined, its legacy continues to influence Indian culture. 

Iran: Iranian civilization stretches back to around 3200 BCE, marked by the rise of Elamite kingdoms and significant contributions to mathematics, astronomy, and legal systems.