The America I grew up in worked together to get the big jobs done.  I guess the World War, Cold War, and Korea, all seemingly "just wars," helped clear our focus.  We Americans joined hands and worked together.  But then Viet Nam and other adventures seems to have undermined that willingness to work together.

"A Wider Ideological Gap Between More and Less Educated Adults"
Political polarization update

http://www.people-press.org/2016/04/26/a-wider-ideological-gap-between-more-and-less-educated-adults/