I have to admit that although I first heard the terms "Sunni Muslims” and "Shia Muslims” years ago, I never bothered to figure out what the differences between the two sects of Islam were. Recently I finally sat down and looked it up. Turns out, the differences aren’t major. But the origins of the sects are pretty interesting – they arose over a disagreement about who should succeed Muhammad, someone elected by the the people or a blood/undemocratically chosen heir. You can find the details here. Here’s a nice chart with the major differences in beliefs between the two.