I would write about changing the fact that humans always want to dominate over other humans. As far back as history is recorded, societies have fought wars. There are not many times when there have not been wars going on somewhere in the world. Even the Bible, which records history from thousands of years ago, talks of many wars. In the 20th Century, there was World War 1, World War 2, the Korean War, the Vietnam War, the Wars in Iraq and Afghanistan. These are only the wars that the United States has been involved in. All other countries have different wars as well.