Well, thanks, I understand some of the basic differences, as do all Christians, but what I was really looking for was something to discuss how Christianity devolved into so many different sects - I was looking for something both historical and doctrinal...and not just merely basic differences or another recitation of the Protestant Reformation - that’s only part of the pie.
p.s nice handle, Clemenza, haha
one of the standard references is Jaroslav Pelikan’s multi-volume The Christian Tradition. Volume 5 covers period since 1700.
Here’s a link to a graphic showing the splits and unions just among Presbyterians:
http://www.history.pcusa.org/pres_hist/family_connections.html
Among churches, splits have occured over disagreements as to scriptural interpretations, false prophesies, personalities, national politics, and mergers.