枢軸時代
These regions were connected via the Silk Road trade route, and they have a pronounced Iron Age period following the Bronze Age. In cultural terms, the Iron Age was accompanied by the so-called Axial Age, referring to cultural, philosophical and religious developments eventually leading to the emergence of the historical Western (Hellenism, "classical"), Near Eastern (Zoroastrian and Abrahamic) and Far Eastern (Hinduism, Buddhism, Jainism, Sikhism, Confucianism, Taoism) cultural spheres.