Many German soldiers were no longer willing to fight.
Mining and finance had great importance in helping the US shift to an industrial economy during the gilded age.
The definition of family has been influenced by societal norms and values. Norms of various societies differ with some societies defining family from the extended family point of view and other from the nuclear family point of view. This depends on whether a society is collectivist or individualistic
Watch the movie the martian or any other space movie