Complex sentence: The term "Conservative Revolution" predates the First World War, but the writer Hugo von Hofmannsthal and the political theorist Edgar Julius Jung were instrumental in making this term an established concept of the Weimar period.
Split into simpler sentences: The term "Conservative Revolution" predates the First World War. The writer Hugo von Hofmannsthal and the political theorist Edgar Julius Jung were instrumental in making this term an established concept of the Weimar period.