Worshipers tend to assume that the patterns of worship that they know have been practiced since time immemorial. A little familiarity with liturgical history soon reveals that that is not in fact the case. You in your churches, with your new Lutheran Book of Worship (1978), have inevitably been introduced to some liturgical history as you had to come to terms with new things that were really old things.
Wainwright, Geoffrey, "Christian Initiation: Development, Dismemberment, Reintegration" (1981). Institute of Liturgical Studies Occasional Papers. Paper 12.