Hayek doesn't seem to grasp that human beings can exist both as individuals and as members of a society, without necessarily subordinating them to the needs of an imposed social plan (although he acknowledges that the state can legitimately serve social needs, he contradictorily views collective benefits as incompatible with individual freedom). He rejects the very concept of social justice, for much the same reasons that he rejects the arbitrary valuation of labor: in Hayek's view there is no way to put an objective value on a grievance or to weigh it against other claims. And because he locates all responsibility and agency only at the level of the individual, he sees no way in which any claim can be generalized to society. Hayek's political philosophy recognizes only negative rights. Positive fulfillment beyond the most basic needs is a matter of individual striving.