Question 1: Why did citizens of Europe and North America feel that life would never be the same after WWI?
Question 2: What specific feelings of bitterness and betrayal within the civilian populations against the governments of all the warring powers gave rise to the philosophy or idea of nihilism, characterized by the Jazz Age and "flappers," in New York and Paris; drug addiction and pornography in Berlin; surrealism and cubism in artistic circles, etc.