We're going to try to kind of give you the topic of economic systems in the next 10 or 11, 12 minutes. And really chop up the historical facts so you can get just a general breeze of what's going on. Probably not enough for a full year course, but maybe if you're studying at the end of the year, it's not a bad idea to check this out. So we're going to look at three economic systems, maybe four, yeah. We're going to look at traditional economic systems, developing then through trade into market-based economic systems, capitalism then. Command economic systems, which is like communism, and then mixed economic systems. So each one, just a few minutes, we're going to kind of go over the big idea and then give you some examples of the history and see if that can't hook you up with a better grade.