An analysis behind the concept of advocacy reveals not only a myriad of definitions and explanations related to patient advocacy, beyond a pleader for the vulnerable or watchdog, but also attributes and roots that go back all the way from the Ming Dynasty to its American birth in the 1920's, and more recently as an egalitarian human rights tool. A brief rich historical tradition serves as a background to put into perspective the reason behind the birth, evolution and growth of advocacy until its current important role in influencing health, not only in the United States, but as a global growing movement. This historical perspective adds to prior related research of the author on the concept and vision behind health equity. But there is more behind the meaning and history of these two intertwined terms as impactful to health, equality and basic human dignity but, most importantly, as able to amplify the voice of one, or many.