Reacting to formless consumerism and reaching for the best of church tradition, Robert G. Rayburn became the vanguard of these modern integrative liturgies. His 1980 O Come, Let Us Worship sought to re-introduce evangelicalism to its history and liturgy. His order of service was a perceptive summary of North American traditions birthed in frontier revivalism combined with a respectful reiteration of Westminster Puritanism. The effect was an intentional honoring of Calvinistic roots and an instinctive echoing of more distant patristic (i.e., ancient Catholic) practices in a worship context dominated by forms of evangelicalism that venerated spontaneity over form. - Bryan Chapell.