Where did the concept of mental illness began? How did we get to where we are today?

How did ancient cultures like the Egyptians/Africans, Greeks, Chinese, and Hindus go about diagnosing mental illness.

What were their remedies?

References:

Ebers Papyrus - Hathitrust.org

SunriseHouse.com (The History & Evolution of Mental Illness)

news-medical.com

Frontiersin.org

"Masters of the  Mind - Theodore Millon"