O Sensei is quoted, in The Art of Peace, as saying “No matter how heavily armed your opponent is, you can use the Art of Peace to disarm him (or her). When someone comes in anger, greet him with a smile. That is the highest kind of martial art.”
This video shows so clearly how our actions, little things each of us do individually, can affect the world. A well-timed smile or hug can change someone just a little. They can affect those around them, and so on. Juan Mann, in the video, maybe affected a few thousand people directly. Over 10,000 signed his petition. Over 100,000 commented on the video on YouTube. Over 56 million people have watched just this version of it. 56 million!
Much of what we do is like dropping a pebble in an ocean. We may never notice the affect of the waves we create, but we do create them. Practice peace.