The Classical period from 600 BCE to 600 CE saw the rise of new civilizations like Persia in the Middle East, Greek and Roman Empires in the Mediterranean, and the Qin and Han Dynasties and later empires in China and India. While monarchies continued to rule and systems like patriarchy, slavery, and social classes persisted from earlier times, this period was marked by growing populations and larger states or empires, as well as new philosophical, religious and technological developments that helped connect societies across vast trade networks.