Garry Wills, the prizewinning historian, argues that changes have been the evidence of life in the Catholic Church. It has often changed, sometimes with bad consequences, more often with good. In this brilliant and incisive study, he gives seven examples of deep and serious changes that have taken place (or are taking place) within the last century. None of them was effected by the pope all by himself. As Wills contends, it is only by examining the...