The right to have one's life terminated at will (euthanasia), is subject to social, ethical, and legal strictures. In some countries - such as the Netherlands - it is legal (and socially acceptable) to have one's life terminated with the help of third parties given a sufficient deterioration in the quality of life and given the imminence of death. One has to be of sound mind and will one's death knowingly, intentionally, repeatedly, and forcefully. II. Issues in the Calculus of Rights The Hierarchy of Rights The right to life supersedes - in Western moral and legal systems - all other rights. It overrules the right to one's body, to comfort, to the avoidance of pain, or to ownership of property. Given such lack of equivocation, the amount of dilemmas and controversies surrounding the right to life is, therefore, surprising. When there is a clash between equally potent rights - for instance, the conflicting rights to life of two people - we can decide among them randomly (by flipping a coin, or casting dice). Alternatively, we can add and subtract rights in a somewhat macabre arithmetic. Thus, if the continued life of an embryo or a fetus threatens the mother's life - that is, assuming, controversially, that both of them have an equal right to life - we can decide to kill the fetus. By adding to the mother's right to life her right to her own body we outweigh the fetus' right to life. The Difference between Killing and Letting Die Counterintuitively, there is a moral gulf between killing (taking a life) and letting die (not saving a life). The right not to be killed is undisputed. There is no right to have one's own life saved. Where there is a right - and only where there is one - there is an obligation. Thus, while there is an obligation not to kill - there is no obligation to save a life. Killing the Innocent The life of a Victim (V) is sometimes threatened by the continued existence of an innocent person (IP), a person who cannot be held guilty of V's ultimate death even though he caused it. IP is not guilty of dispatching V because he hasn't intended to kill V, nor was he aware that V will die due to his actions or continued existence. Again, it boils down to ghastly arithmetic. We definitely should kill IP to prevent V's death if IP is going to die anyway - and shortly. The remaining life of V, if saved, should exceed the remaining life of IP, if not killed. If these conditions are not met, the rights of IP and V should be weighted and calculated to yield a decision (See "Abortion and the Sanctity of Human Life" by Baruch A. Brody). Utilitarianism - a form of crass moral calculus - calls for the maximization of utility (life, happiness, pleasure). The lives, happiness, or pleasure of the many outweigh the life, happiness, or pleasure of the few. If by killing IP we save the lives of two or more people and there is no other way to save their lives - it is morally permissible.