Most Americans say they believe in God, and more than a third say they attend religious services every week. Yet studies show that people do not really go to church as often as they claim, and it is not always clear what they mean when they tell pollsters they believe in God or pray. This work presents up-to-date information about religious trends in the United States. It provides information about key developments in American religion since 1972. Here the author looks at trends in diversity, belief, involvement, congregational life, leadership, liberal Protestant decline, and polarization. He draws on two important surveys: the General Social Survey, an ongoing survey of Americans' changing attitudes and behaviors, begun in 1972; and the National Congregations Study, a survey of American religious congregations across the religious spectrum. He finds that American religious life has seen much continuity in recent decades, but also much change. He challenges the popular notion that religion is witnessing a resurgence in the United States, in fact, traditional belief and practice is either stable or declining. He examines why the decline in liberal Protestant denominations has been accompanied by the spread of liberal Protestant attitudes about religious and social tolerance, how confidence in religious institutions has declined more than confidence in secular institutions, and a host of other crucial trends.