i think the best way to sum up left and right is to list the -isms and concepts that they endorse, because, essentially, thats what left and right are:
leftism:environmentalism, communism, socialism, equality between classifications of humanity, many adopt symbolisms and ritualisms into their lives, broadening definitions of ethics and ethical standards, which includes political correctness, among other things, new world ideals....etc.
rightism:the major religious indulgance, nationalism, many types of traditionalism, old world ideals, fundamentalism, industrio-globalizationism, imperialism.....you get the point, i just want another way for people to see it.