 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.He cannot rightfully be compelled to do or forbear because it will be better for him to do so, because it will make him happier, because, in the opinion of others, to do so would be wise, or even right.… The only part of the conduct of anyone, for which he is amenable to society, is that which concerns others.