A distinction between negative and positive rights is popular among some normative theorists, especially those with a bent toward libertarianism. The holder of a negative right is entitled to non-interference, while the holder of a positive right is entitled to provision of some good or service. A right against assault is a classic example of a negative right, while a right to welfare assistance is a prototypical positive right (Narveson 2001).
Since both negative and positive rights are passive rights, some rights are neither negative nor positive. Privileges and powers cannot be negative rights; and privileges, powers, and immunities cannot be positive rights. The (privilege-) right to enter a building, and the (power-) right to enter into a binding agreement, are neither negative nor positive.
It is sometimes said that negative rights are easier to satisfy than positive rights. Negative rights can be respected simply by each person refraining from interfering with each other, while it may be difficult or even impossible to fulfill everyone's positive rights if the sum of people's claims outstrips the resources available.
However, when it comes to the enforcement of rights, this difference disappears. Funding a legal system that enforces citizens' negative rights against assault may require more resources than funding a welfare system that realizes citizens' positive rights to assistance. As Holmes and Sunstein (1999, 43) put it, in the context of citizens' rights to state enforcement, all rights are positive. Moreover, the point is often made that the moral urgency of securing positive rights may be just as great as the moral urgency of securing negative rights (Shue 1996). Whatever is the justificatory basis for ascribing rights—autonomy, need, or something else—there might be just as strong a moral case for fulfilling a person's right to adequate nutrition as there is for protecting that person's right not to be assaulted.