"Historically, Catholics have argued that the papacy was a divinely-given institution papacy (Matt 16:17-19) etc., and they have relied on the notion that there have been bishops of Rome extending all the way back to the time of Peter. This notion of bishops extending all the way back was thought to be actual history. In fact, as Shotwell and Loomis pointed out, in the General Introduction to their 1927 work "The See of Peter": With reference to the Petrine doctrine, however, the Catholic attitude is much more than a "pre-disposition to believe." That doctrine is the fundamental basis of the...