And, yet it seems clear that Presbyterians have no problem separating over some issues (although in Durham's argument, the corruptions must be "excessive" to warrant separation). But it seems as if the Reformation itself was one big separation from the RCC, and then further division into all the various Protestant branches. And even looking solely at the Presbyterian family tree makes one dizzy with all the separations. It's almost impossible to even trace the history of it there are so many branches, separations, reunions, etc...and that's just in America since the 1700s...I'm looking at the diagram/family tree of American Presbyterianism on the last page of "Seeking a Better Country" by Hart and Muether. Easy to get lost tracing all the different paths...(how one answers that is basically the difference between Presbyterianism and a separatist mindset)