They traded with them selves.
Their civilization has never paused, or changed. They still have their old cultures (sort of) They still have the same language.
The answer is "biopsychosocial perspective".
The biopsychosocial perspective refers to a coordinated way to deal with psychology that joins three alternate points of view and kinds of examination:biological, psychological, and social-cultural. The biopsychosocial approach is a comprehensive way to deal with understanding a person's conduct that credits it to numerous causes as opposed to only one. This viewpoint takes into consideration the way that the collaborations of our body, mind, and our condition all influence each other in various ways.
To bring to a State of peace or quiet
