If the citizens were not required, no one may want to. On jury, you may have a case that may take a long time and you may end up sentencing someone to death. It is likely if citizens were not required that no one would want to volunteer.
Berg and Webern continued Schoenberg's work with Serialism in music.
Isolationists didn't want to join European schemes or war efforts. The Lend-lease program was a program by the government to help send help to Europe but isolationists wanted to stay on their continent and not participate in any of the affairs there.
