the sunni is an arabic word wich means the one who follows the tradition,therefore, its an static madhab while the shia mad-hab is more dynamic and engaging wich makes more progressive specifically the second largest shia sect smailism and druz the only islamic mad-habs where the polygamy is looked down upon and is forbidden. for enough example of their progressivness is the pakistan founder mahamed ali janaah who was ismaili
as for peace i have yet to see any shia sect who isnt forbidden the suicide even hizpullahs of iraq does not do it
basically im intersting to know the principles of each muslim sect, it does not make me shia and its not a good thing to judge others beliefs, im just forwarding some of the ideas i was fishing for,anything that gets muslims through the modern world.