Offering a fresh approach to one significant aspect of the soteriology of Thomas Aquinas, God's Grace and Human Action brings new scholarship and insights to the issue of merit in Aquinas's theology. Through a careful historical analysis, Joseph P. Wawrykow delineates the precise function of merit in Aquinas's account of salvation. Wawrykow accounts for the changes in Thomas's teaching on merit from the early Scriptum on the Sentences...