My latest reading of W.A. Swanberg's Norman Thomas: The Last Idealist
 was about Thomas' views on the anti-war movement in the 1960's.  Norman
 Thomas was a six-time Socialist candidate for President of the United 
States.
Thomas was opposed to the Vietnam War, but he had issues 
with the anti-war movement.  Thomas could still gain a receptive 
audience among a number of young people during the 1960's, even though 
he was over 30, and one of the mottos of many within the younger 
generation in those days was "Don't trust anyone over 30."  My guess is that this was on account of Thomas' status as a veteran 
within the left-wing, his reputation as a person with integrity, and his
 talent as a public speaker.
But Thomas took issue with how many within 
the anti-war movement were cheering for Communism to win in Vietnam 
rather than emphasizing the importance of a peaceful resolution, and he 
thought that they should be missionaries for the anti-war cause rather 
than rebelling against the culture.  If they were missionaries for the 
anti-war cause, Thomas contemplated, perhaps they could get enough 
people to influence President Lyndon Johnson to end the war.
Thomas
 was also not a big fan of civil disobedience, which he considered to be
 self-defeating, plus he was not for the disruption of "organized 
society" (Thomas' words, quoted on page 462).  Rather than refusing to 
pay his taxes, as one of his acquaintances did, Thomas paid his taxes 
while noting in a letter to the government that he had moral objections 
to some of the things that the taxes were paying for, such as war.  I don't think that Thomas was for people rolling over and playing dead 
when the government was stomping on civil liberties.  Plus, my 
impression (and I'm open to correction on this) is that he was 
sympathetic to those who dodged the draft.  But he most likely didn't 
want the Left to be overly provocative when it did not need to 
be----when it needed to build bridges rather than alienating people.