 One version of this approach emphasizes that contracts generally (some theorists claim always) arise inside already existing commercial and even social relationships. The “theory of relational contracting” seeks the basis for enforcing contractual promises in the norms that govern the background relationships. Legal sociologists working in this vein have emphasized that contracting, especially in commercial contexts, relies on the parties’ antecedent commitments to integrity or “common honesty and decency” (Macaulay 1963). Others emphasize social norms involving reciprocity and respect, especially within close-knit contracting communities (Bernstein 1992). Still others approach contract law through a theory of exchange relations according to which every contract is “necessarily partially” embedded in a thick context of extra-legal relations, from which it draws its legal authority and force (Macneil 1980).