http://www.washingtonpost.com/news/checkpoint/wp/2015/06/08/a-stirring-v...

Don't mind the title of the article, or the article itself, which focus only on the lethality of WWII.  Watch the video all the way to the end, it's not as depressing or morbid as the article suggests.  The video's creator concludes with some amazing points on how much better the world is today.  I like to think that's because of the few who gave so much for so many.