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Back in July of 2012, James set up a points system for ranking all of baseball history's dynasties. A fan wrote in today and updated the scores, so, good on him.
Definitions: "Dynasty" is taken from royal dynasties, a series of rulers from the same family. Practically speaking, James gives "a series of successful teams that ... have key personnel in common." Getting any more precious about the def than that leads to trouble, and Dr. D approves of James' habit of avoiding the trap that sabes get into, that of quibbling about hair-fine distinctions.
By the way, he gives the first Dynasty in MLB history as the 1880-1886 Chicago Cubs, with Cap Anson and Albert Spalding. (Heh.) He's got three dynasties from the 19th century, and then the 20th century leads off with the 1900-12 Pirates, of course with Honus Wagner but also with Rube Waddell, Jack Chesbro and about 7 other stars. The Pirates had "merged" with Louisville to form a true "superteam;" this year the sabermetricians told us there were 4 or 5 "superteams" in the playoffs. :: sniff ::
A few takeaways from the accounting post-2017: