枢軸時代
The preceding Iron Age is often thought to have ended in the Middle East around 550 BC due to the rise of historiography (the historical record). The Axial Age is used to describe history between 800 and 200 BC of Eurasia, including ancient Greece, Iran, India and China. Widespread trade and communication between distinct regions in this period, including the rise of the Silk Road. This period saw the rise of philosophy and proselytizing religions.