Without peace there can be no further progress on earth. The simple truth is this: We have reached the point in human evolution where the only possible future is a peaceful one.
Now, there are many people who argue: "Oh, we're never peaceful and we'll always try to kill each other." The truth is most people don't want to go around murdering each other. Out of six billion people, most are actually very nice peaceful people. Unfortunately we have not been willing to restrain the few rabid dogs that routinely like to attack the flock.