Paternalism: Introduction

Paternalism is the interference of a state or an individual with another person, against their will, and defended or motivated by a claim that the person interfered with will be better off or protected from harm. The issue of paternalism arises with respect to restrictions by the law such as anti-drug legislation, the compulsory wearing of seatbelts, and in medical contexts by the withholding of relevant information concerning a patient's condition by physicians. At the theoretical level it raises questions of how persons should be treated when they are less than fully rational. 

by Stanford Encyclopedia of Philosophy