Up until the people suffering severe mental illnesses were sometimes thought to be possessed by demons or evil spirits.

The year where people kept suffering from severe mental illness by which they are sometimes to be thought that they are being possessed by an evil entity or demon was during until the year of the late 1700s where people strongly believed that these people are possessed.

The late 1700s

Explanation:

Three models explain mental illness such as biological model, psychological model and supernatural model in the early century. People who behave abnormally in society, they have to be considered as possessed by a supernatural power.

It has been shown that it is a battle between two-spirit good and bad. The people who behave in an unwanted way have to blame that they are being possessed by an evil spirit. Both physical and mental illnesses were considered because of the possession of evils. It happened in all countries, in all religions and mostly in all community people.

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