 The obvious place to start is with the economist’s idea of public goods. We might reasonably suppose with Raz (1986, 208) that a right can be a group right only if it is a right to a good that is public to the members of the right-holding group. For the relevant group, the good must be non-excludable (it must be available to all members of the group) and non-rival (its consumption by one member of the group must not diminish its possible consumption by other members). However, as Denise Réaume has pointed out (1988, 8–9), some goods that are deliverable only as public goods can reasonably be considered objects of individual rights. Clean air is a standard example of a public good, but we can reasonably hold that individuals have rights to clean air as individuals. An industrialist who seriously pollutes a community’s atmosphere might be held to violate the right to breathe unpolluted air of each individual in the affected community rather than a collective or corporate right of the community as a group.