Every story told in the show is almost completely historically accurate. The fact that you can, and will, actually learn from this show is funny in a meta-way. Abed from Community would be proud. While the stories wont include every single specific detail, the gist of the stories can be obtained so that a very general historical understanding can be gained enough so that you can converse with others about them. That means that you can watch this show for half an hour, laugh out loud quite a few times, and learn some stories that make you a more intelligent and well-rounded human being.