The idea of a heavenly contract, uniting God and humanity in a bargain of salvation, emerged as the keystone of Puritan theology in early modern England. Yet this concept, with its connotations of exchange and reciprocity, runs counter to other tenets of Calvinism, such as predestination, that were also central to Puritan thought. With bold analytic intelligence, David Zaret explores this puzzling conflict between covenant theology and pure Calvinism....