"As the mainline Protestant traditions become more of a sideline, and evangelicalism vies with Roman Catholicism for dominance in the Global South-the new center of gravity in world Christianity-evangelical theology may continue to be influenced by Catholic thought. Rivals often come to resemble each other. Catholics and evangelicals have fought abortion together. Evangelical theologians increasingly draw sustenance from Catholic moral and historical theology. Catholics have launched a new evangelization in partial response to evangelical gains in Latin America, and Catholic theology has reshaped its formulation of justification as a result of evangelical and other Protestant theological dialogues. Evangelicals will continue to believe that Catholics submit themselves to a human magisterium rather than the divine Word, and this will be sounded with more vigor in Global South churches. But just as sixteenth-century Protestant and Catholic theology reacted against each other and thereby influenced each other, twenty-first-century evangelical theology may unwittingly find itself to be not only a leavening agent in the broader church catholic but also shaped in part by its principal challenger."