How useful is Harm principle?

Create a thesis and an outline on How Useful Is Harm Principle in Helping Us Define the Limits of Free Speech. Prepare this assignment according to the guidelines found in the APA Style Guide. An abstract is required. That the only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others. His own good, either physical or moral, is not sufficient warrant.