AUDIO - Scapegoats Blacksheep - Workplace Family System - Narcissism in Society

I have been asked to speak more deeply about scapegoats and blacksheep in workplaces, society & families. What are the roles, and what is the reason for the role? Is it due to a personality flaw in the scapegoat him or her self? I use an example of the function of the 'scapegoat' in workplaces