Soft and hard Soft paternalism is the view that paternalism is justified only if an action to be committed is involuntary.
John Stuart Mill gives the example of a person about to walk across a damaged bridge. Because the person does not know the bridge is damaged and there is no time to warn him, seizing him and turning him back is not an infringement on his liberty. According to soft paternalism, one would be justified in forcing him to not cross the bridge so one could find out whether he knows about the damage. If he knows and wants to jump off the bridge and commit suicide, then one should allow him to. Soft paternalism is the intervention due to a person not having the rationality or ability to make decisions. If a patient in an emergency room is intoxicated or unconscious, they do not possess the rationality or ability to make decisions for themselves and any decisions made on their behalf would be soft paternalism. Hard paternalism does not rely on the absence of rationality or ability. In the emergency room example, the patient is sober or conscious and possesses the rationality and ability to make decisions about their care. Any decision that is made on their behalf would be hard paternalism.
Pure and impure forms Pure paternalism is paternalism where the people having their liberty or autonomy taken away are those being protected. Impure paternalism occurs when the class of people whose liberty or autonomy is violated by some measure is wider than the group of persons thereby protected.
Moral and welfare Moral paternalism is where paternalism is justified to promote the moral well-being of a person(s) even if their welfare would not improve. For example, it could be argued that someone should be prevented from prostitution even if they make a decent living off it and their health is protected. A moral paternalist would argue that it is ethical, considering they believe prostitution to be morally corrupting. ==Criteria for effective paternalism==