KS Radhakrishnan (KSR) is a Political Activist, Legal Expert, Human Rights and Environmental activist, Writer and Columnist.

KS Radhakrishnan (KSR) is a Political Activist, Legal Expert, Human Rights and Environmental activist, Writer and Columnist. He hails from an agricultural family and is a native of Kurunjakulam village, then Tirunelveli District, Tamil Nadu.

He was the youngest and the first one of his kind when he was nominated as a principal spokesperson of a political party thirty-four years back. As a Political Activist, he has seen the inner walls of the prisons quite often.