Some good historical data especially regarding colonial church attendance, the rise of sectarian revivalism, and the sedentary reality of the Protestant Mainline churches in America in the 19th and 20th century once modernity became entrenched in the American Universities and Seminaries and much of the clergy they were producing (chapters 6 and 7 respectively).
The book also does a good job of revealing the human penchant of any organized group (here, being mainline churches in the United States) to find the results they have already decided on (especially related to the promise of the ecumenical movement and the expected vitality that ended with exactly the opposite result – ch. 6.) The book also reveals some characteristic influences which contribute to the emotional and anti-intellectual rise, and the reactive elitist malaise and decline as the Protestant religious institutions stagnated.
That said, the book tends to be reductionistic and pragmatic. The general thesis seems to be that the "wilderness times" of the sects in their continual splintering, initial energy (coupled with a large dose of anti-intellectualism) is what gives growing churches their vitality. While it is also true that these churches valued the super-natural, spiritual commitment, and some of the core doctrines of Christianity, the instability and immaturity, lack of accountability and spiritual harm that these sects/cults promoted goes unnoticed and almost praised as a model. The cult like power and influence of many leaders (including Whitfield), the power games, relational chaos, and doctrinal confusion that often accompanied these sectarian cultures seem unknown to the authors. One also wonders at times when the authors speak of the renewal of Protestantism or Roman Catholicism, if the Holy Spirit, institutional stability, and spiritual maturity need ever to be present amongst healthy, maturing, and lasting church bodies.
I am always reminded regarding the church where the Azuza Street Revival started, was only in existence for thirty years due to infighting and an eventual split. An ecclesiological theology dependent on constant, emotional, and miraculously impressive “movements” rarely develop a Christianity that allows for forgiveness of one-another, shared-life/accountability, and any sense of long-term harmony. Whatever the weakness of the Mainline Protestant Churches (And there are many, with most of our denominational Leadership thinking they are smarter and wiser in their post-modernism than Jesus the Messiah or our Holy Scriptures), my Episcopal Church Parish is celebrating its 171st year in existence here in Bloomington, IL (and in our Diocese, there are many of our small churches that can make a similar statement).
It seems the norm desired by the authors is that the populist church (in any time-period) that is growing, is desired. But many of these sectarian groups (including Baptist and Methodist) where also embracing a kind of democratic style of church that would better resonate to frontier and colonial Americans. How much of this was Christianity, and how much of this was "a kind of conservative cultural religion” to the liking of their constituency (keep it simple, stupid!) while denying the power thereof". Growth and capital majority rarely equals faithfulness to the Triune God in Holy Scripture.
That said, there are some real gems in this book. One of them says this, and sums up this books strength for me:
“In recent work, we have found that to the extent that people seek religion - and not all do - the demand is the highest for religions that offer close relations with the supernatural and distinctive demands for membership, without isolating individuals from the culture around them. Few want a religion that forces complete submission requiring a life of isolation from secular society. Likewise, few want a religion whose God is so distant and powerless as to offer little assistance in daily living and few promises for the life hereafter”.
It seems to me that this observation from sociological research bodes well on the fruits which come from a faithful, historic, gracious, and orthodox Christianity empowered by the Holy Spirit through Word and Sacrament.