What was a Key development that occurred globally during the classical era was?

A key development during the classical era was the establishment of large empires, such as the Roman Empire, Han Dynasty, and Maurya Empire, which facilitated extensive trade networks and cultural exchanges across vast territories. These empires implemented advancements in governance, infrastructure, and communication, allowing for the spread of ideas, technologies, and religions. The period also saw the rise of significant philosophical and religious traditions, such as Confucianism, Buddhism, and Stoicism, which shaped societal values and influenced future civilizations. This era laid the groundwork for many aspects of modern civilization, including legal systems, political structures, and cultural practices.