Original sentence: These variously named groups, Lutherans, Anglicans, Presbyterians, Catholics, etc
Edited sentence: (Note: the Catholic Church and Eastern Rites also consider Holy Scripture authoritative, but not greater than Apostolic Succession.And so because of the loss of Apostolic Authority (Succession), the subsequent denominations that broke from these three major Reformation churches neither have valid Bishops.Because the Lutheran Church, the Anglican Church, and the Presbyterian Church do not have valid Bishops (though some claim to) who received their authority through the laying on of hands by valid Bishops in true Apostolic Succession, they are then technically called "denominations" because they are "break-away" or schismatic churches.Bishops, from the New Testament to today, are those men who recieve Apostolilc Succession; a grace of the Holy Spirit to teach and govern in orthodoxy.From Christian authority they have the Holy Scriptures.It was at this time that individual men began breaking from Apostolic Authority (Succession) and "doing there own thing" as what "seemed right in their own eyes".So it would seem that Christ's prayer that "they be one" came to an end.The Protestant Reformation is near unanimously seen as that tumultuous period late in Christian history which became the root cause to the plethora of denominations we have around us today.The only other "entities" not considered "denominations" would be those belonging to the Catholic Church and those of the various Eastern Orthodox rites of Christendom.The three major key players in the Protestant Reformation were; Martin Luther, King Henry VIII of England, and John Calvin.These groups are not technically considered denominations, per say, because of a principle called Apostolic Succession; that is, their derive an ancient authority from the Apostles who founded the most ancient churches before the Scriptures were even cannonically authoritative.These three men are most well known, and by them nearly all of the denominations have their origins.These variously named groups, Lutherans, Anglicans, Presbyterians, etc.This is because through the grace of Apostolic Succession - most notably in Eccumenical Council - the Holy Scriptures are interpreted.This then takes away private interpretation from the laity (who of course could be wrong) and thus finds a difinitive interpretation by the Holy Spirit through ordained authority)