What did the 1968 march at the Chicago Democratic Convention prove?

Was there any good that came out of this situation for all of those involved, our country and the war in Vietnam?

Did Arfrican Americans and other minorities achieved anything benefical from 1968?.

During 1968 what did our county learn from everything that was happening?

http://en.wikipedia.org/wiki/1968_Democratic_National_Convention_protest_activity

http://www.cnn.com/ALLPOLITICS/1996/conventions/chicago/facts/chicago68/index.shtml

http://l3d.cs.colorado.edu/systems/agentsheets/New-Vista/chicago68/background.html