 An important question facing the pluralist is whether there are reasons for contract law’s pluralism. The answer might seem obvious, as if it were lawyerly commonsense. The law of contracts has developed over the course of several centuries, with many diverse juridical personalities disagreeing on how best to resolve contract disputes. Some of the law’s guiding principles have survived both this competitive process and changing normative fashions in the broader culture; others have been modified. The expectancy remedy and pacta sunt servanda principles may be relics of a bygone age’s commitment to bare promissory duty. But efficient breach and related doctrines have evolved to prevent promissory virtue from getting in the way of social welfare, especially in economies marked by a high-frequency spot contracts among parties with no relationship outside of the contracts at issue. These tensions within contract law are, as one commentator puts it, “historical and political accidents” (Alces 2008).