We're going to get alliance systems like NATO, the Warsaw Pact, we're going to end up with OPEC, all kinds of things. I could just go on forever, but I better stop. So late 1930s to 1945, World War II, consequences are huge. If you don't know it, you're in big trouble. Remember, where attention goes, energy flows, so do your best and just focus, and I always say it's better to be authentic and to watch it because you want to learn than because you're trying to study for a test. So I know that's hard as a kid to kind of think of, but do the best you can to relax as you watch these lectures and you study. Use other methods.