English
ersatzism
From ersatz + -ism.
Formed from ersatz + -ism
Proto-Indo-European *sed- ‘to sit’
…
Old High German irsezzen
Middle High German ersetzen
German ersetzen ‘to replace, to substitute’
German Ersatz ‘replacement, substitute’
English ersatz
Today it means
noun The doctrine that only one concrete world exists, and all other possible worlds are abstract.
Language periods are conventional ranges, not dates for this word.
Etymograph / ersatzism