This is an example of how a Trotskyist tree could look like, with forks and remergings, etc.

OCRF, Socialist Equality Parties, WRP
    									      OCi (de facto 1967)
    									       /   (official 1971)
    	 |	international Committee ---- SWP Revolutionary Tendency, SLL, PCi
    	 | 	     /			\	(Worker's League)------(WRP)-------dwindling iC,
    	 |	     |			 |				   Socialist Equality Parties
    	 |	     |			 |
4i --- 1940s ----- 1953 --------------- 1962 --- uSec,reunified 4i -- renamed 2003 ---  ? 2009
these are the groups that collectively form the Fourth International, please include others i missed


not unlike the controversy of the one true Church, where the Anglo-Catholic Tradition does not deny the apostolic succesion in the Roman Catholic Church, but has its own tradition that was derived from it; nevertheless, the Roman Catholic Church remains the mother Church from which all other non-Eastern Christian organizations in Europe are derived from or split from
and even the Catholic Church shares a common origin with the Eastern Churches, both orthodox and non-orthodox
collectively, they all share the same claim to be part of the the "one" true Church of Christ on Earth, and none of them can exclude all the rest
by analogy, the Fourth Int'l shares common origin with the 3rd Int'l but also represents a break from it, much like how the R.Catholic Church relates to the Eastern Churches, but along the way schisms and apostasies and repudiations and "revivals" occured in the Fourth Int'l, much like in R.C.C, which gave rise to the many organizations we know today are derived from it
in much the same way as the R.Catholic Church is the surviving organization of the original mother Church of all Western Christianity, the reunified Fourth Int'l is the surviving org. of the original mother movement we call the Fourth Int'l, there is continuity and unbroken succession of leadership, though dogmas and ideologies and practices may have changed along its path


pictured model

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text box model

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Ancestry of George Frederick, Prince of Prussia, may be hard to replicate in the ancestry of todays Trotskyist groups from the Fourth_International..


William II, German Emperor
William, German Crown Prince
Augusta Viktoria of Schleswig-Holstein
Louis Ferdinand, Prince of Prussia
Frederick Francis III, Grand Duke of Mecklenburg-Schwerin
Duchess Cecilie of Mecklenburg-Schwerin
Grand Duchess Anastasia Michailovna of Russia
Prince Louis Ferdinand of Prussia
Grand Duke Vladimir Alexandrovich of Russia
Cyril Vladimirovich, Grand Duke of Russia
Duchess Marie of Mecklenburg-Schwerin
Grand Duchess Kira Cyrillovna of Russia
Alfred, Duke of Saxe-Coburg and Gotha
Princess Victoria Melita of Saxe-Coburg and Gotha
Grand Duchess Maria Alexandrovna of Russia
George Frederick, Prince of Prussia
Wolfgang, Prince of Castell-Rüdenhausen
Casimir, Prince of Castell-Rüdenhausen
Princess Emma of Ysenburg and Büdingen in Büdingen (1841-1926)
Siegfried, Prince of Castell-Rüdenhausen
Count William Charles of Bentinck
Countess Mechtilde of Bentinck
Maria Cornelia van Heeckeren van Wassenaer
Countess Donata of Castell-Rüdenhausen
Otto, Count of Solms-Laubach
George Frederick, Count of Solms-Laubach
Princess Emma of Ysenburg and Büdingen in Büdingen (1870-1944)
Countess Irene of Solms-Laubach
Charles, Prince of Solms-Hohensolms-Lich
Princess Johanna of Solms-Hohensolms-Lich
Princess Emma Caroline of Stolberg-Wernigerode