The Mauryan Empire was founded by Chandragupta Maurya in 321 BC and conquered Northern India. It reached its peak under the rule of Emperor Asoka in the 3rd century BC, who converted to Buddhism and promoted tolerance. The Gupta Empire arose in the 4th century CE and ruled during a Golden Age of arts and sciences. Ancient Indian society was divided by caste, and women faced restrictions. However, India also achieved advancements in fields like mathematics, medicine, and vaccination.