For those who want to trace the lineage of researchers, there’s a map with revisions …
Originated in 1996 by Dr. Eric Schwarz, Neuchâtel, Switzerland.
Extended in 1998, including items from the “The Story of Philosophy” by Will Durant (1933).
Elaborated in 2000-2001 from many sources for the International Institute for General Systems Studies.
Extended in 2016 by Benjamin Hadorn, Fribourg, Switzerland.
Of course, the reality is more complicated than that!