The valued ability to speak effectively and persuasively dates back to

The answer for this question is:  3200 B.C.E
During this period of time, Civilizations started to recognize organizational activities and the basic structure of Governance.
This condition make someone that has the ability to speak effectively and persuasively could get people to do his/her bidding and they could obtain power within a certain society.

Since the time there were born it depends, there's fun violence, abuse, r@pe, kidnappings, threats, hostages ect.