Why did they begin wearing masks and costumes?

Masks and costumes have been worn throughout history for various reasons, including cultural, religious, and social purposes. They were often used in rituals, celebrations, and theatrical performances to represent different characters or spirits, allowing individuals to transcend their everyday identities. In some cases, masks served as a form of protection or anonymity, enabling people to engage in behavior that might be socially unacceptable without fear of recognition. Additionally, during times of epidemics, masks became essential for health protection, as seen in the use of plague masks in the past.