In this Crash Course video, John Green teaches you about the Roman Empire, which of course began when two totally nonfictional twins, Romulus and Remus, who'd been raised by wolves, founded a city on seven hills. Senatus Populusque Romanus was one of the mottoes of the Roman Republic. So we're going to do some old school Great Man History and focus on Julius Caesar while trying to answer a question: When, if ever, is it OK to stab someone 23 times? [12:26]