A lot of games these days have a pretty standard two-pole alignment system: You're evil, or you're good. Hero or villain. Paragon or a Renegade. Jedi or Sith. Which is good and all, but once you leave the realms of childhood and politics behind, you realise that the world is more complex than goodies and baddies. People are more complex. You need an alignment system that captures this complexity and lets you roleplay better.