You see it in media all the time. There's combat. Lives are on the line. Someone turns and flees. They are a coward. If they aren't swiftly executed by a superior, they are cast out by their peers. They are mocked, derided. In a more general, real-life sense, does refusing to sacrifice yourself mean you are a coward? If someone's being mugged and you do not intervene, are you a coward? If you have the choice between your life or someone else's and you pick your own, are you a coward? Is preservation of your own life truly an indicator of cowardice?