Definition of to immanentize the eschaton in English:

to immanentize the eschaton

US Politics
  • To attempt to bring about utopian conditions in the world; to seek to create heaven on earth. Frequently in negative contexts, as "don't immanentize the eschaton".

    Apparently coined by William F. Buckley with allusion to the writings of Eric Voegelin. The phrase is commonly used depreciatively by conservative critics of progressive or utopian political ideologies, as communism, socialism, etc.