The first half of Douthat's book summarized how we got to where we are today. It's a familiar story - familiar certainly to those of us either old enough to have lived through it or historically aware enough to appreciate how our relatively recent past was so very different from our present. It's the familiar story of a "Lost World" of confident, evangelizing, post-war American Christianity and its largely (and seemingly self-inflicted) decline. Douthat's "Lost World" examined four successful strains of post-war American Christian experience - Mainline Protestantism (personified by Reinhold Niebuhr), Evangelical Christianity (represented by Billy Graham), Roman Catholicism (exemplified by Fulton Sheen), and African-American Christianity (de-marginalized by Martin Luther King, Jr.). From there, the familiar trajectory is traced, as most major American Church groups, for the first time in American history, suddenly stopped growing and entered a period of unprecedented decline (as they frantically aspired to remain relevant by accommodating to the culture which they were originally meant to convert).
In the second part of Bad Religion, Douthat discussed four "heresies" that have come to dominate contemporary American culture and America's still ostensibly Christian religion: "heresies" he calls "Lost in the Gospels" (a fashion for finding a "real" Jesus prior to and apart from the historical Church), "Pray and Grow Rich" (an uncritical reconciliation of Christianity with prosperity), "the God Within" (a pyschologized, self-absorbed religiosity, what Philip Rieff famously warned against in his 1966 classic, The Triumph of the Therapeutic), and finally "The City on the Hill" (our contemporary - and if anything significantly increased since 2012 - uncritical reduction of religion to politics). What all these "heresies" have in common - the goal of all heresies, according to Douthat - is "to extract from the tensions of the gospel narratives a more consistent, streamlined, and noncontradictory Jesus," in contrast to Christian orthodoxy's "fidelity to the whole of Jesus."
Douthat identified "four potential touchstones for a recovery of Christianity, each of which has both possibilities and limitations. The first, he called, "the postmodern opportunity" (the possibility of the Church confronting and responding to globalized rootlessness, widespread skepticism, and religious relativism as the Church has successfully confronted and responded to such forces in its past). Personally, I suspect that may account for some of the seeming revival of spirituality and religion that appears to be occurring at present in certain settings. The problem with that for religion, however, is the challenge "to avoid simply becoming a kind of warmed-over accommodationism," which may end up ultimately more interested in adapting to the culture than in changing it."
Douthat concluded with an exhortation to the kind of individual and communal faith that can animate what he calls "a Christian renaissance." He called for a faith that is "political without being partisan," which frees Christians to embrace different political positions, while being open to the Gospel's challenge to every ideology. He recalled how not that long ago "America's leading Evangelical politician was the antiwar environmentalist Republican Mark Hatfield, and one of its leading Catholic officeholders was the pro-life Democrat Sargent Shriver. But what, one wonders in the light of all that has happened since, would be required to enable anything like that now? Secondly, he suggested "a renewed Christianity should be ecumenical but also confessional" and offered Timothy Keller (The Reason for God, 2008) as a model. Thirdly, he proposed "a renewed Christianity should be moralistic but also holisitic." By this, he meant not downplaying Christianity's moral demands in the area of sexuality but also not acting as if there were only one, rather than seven, deadly sins - and not exclusively emphasizing culturally contentious issues such as homosexuality, while neglecting, for example, "the heterosexual divorce rate, the heterosexual retreat from marriage, and the heterosexual out-of-wedlock birthrate that should command the most attention from Christian moralists.""
Finally, Douthat insisted, "a renewed Christianity should be oriented toward sanctity and beauty." He concludes: "Only sanctity can justify Christianity's existence; only sanctity can make the case for faith; only sanctity, or the hope thereof, can ultimately redeem the world. ... To make any difference in our common life, Christianity must be lived - not as a means to social cohesion or national renewal, but as an end unto itself."