What was the game changers of the classical era 600 bce to 600 ce?

The game changers of the Classical Era were:

Confucius (551-479 BCE). Confucius was a man who developed concepts about society, education and government. His philosophy remained in force for millenia to come. Greco-Persian Wars (500-479 BCE). The small and divided Greek cities won against the Persian Empire and showcased Greece's momentary unity. Reign of Alexander the Great (336-326 BCE). A remarkable leader. Spread culture and made an Empire conquering the Mediterranean, India and Egypt. Died undefeated. Mauryan Dynasty (321-185 BCE). India's first great Empire. It developed India's economy and spread Buddhism and Aryan culture. Han Dynasty (208 BCE - 220 CE). China's golden age. Flourishment of science, technology, arts and crafts. Jesus (0-33 CE). His teachings inspired the creation of Christianity. His ideals both unified and divided people. Changed the course of history forever. Trans-Saharan Trade (300 CE). Major route in Northern Africa that went through the Sahara Desert, making trade no longer dependant on fair weather. Split of the Roman Empire (330 CE). After the Crisis of the Third Century, the Roman Empire divided in two, which led to the creation of the Byzantine Empire. Collapse of the Western Roman Empire (478 CE). The collapse generated by nomadic groups' forces, took the Western Roman Empire to the Dark Ages and the return of Feudalism. Sui Dynasty (589-618 CE). The Sui Dynasty reunited China for the first time in almost 400 years. Spread buddhism.

The Classical Era, 600 bce to 600 ce, gave rise to influential philosophies such as Confucianism, Daoism and Legalism. In India, the teachings of Siddhartha Gautama, the Buddha, challenged the social inequalities associated with Hinduism. Zoroastrianism, located in ancient Persia, gained political influence under the Sassanid Dynasty. Judaism, Christianity and and later on Islam, developed with similar ideas related to concepts of good vs evil. States and empires emerged under dynasties like the Maurya and Gupta in South Asia, and the Zhou, Qin and Han in East Asia. The Mediterranean Sea gave rise to a variety of people that ranged from the seafaring Phoenicians to the imperialistic Roman Empire.