Structuralism

Things aren't always black and white.
Though for some categories there are clear meanings- like Life and Death, you can only be either one or the other.
With good or evil though, theres a grey area; you cant be purely good or purely evil, most people can be mainly one or the other, but its natural to have a little bit of opposite within you. Its oine of the things that makes you human i guess, and the whole yin-yang idea applies there too.
There are games nowadays that actually replicate this whole idea; giving you that choice to do be one or the other, and like in real life you there are consequences for whether you are good or bad.
Games like fable, GTA or infamous for example, you actually change in appearance, and characters react differently to you depending on what you do.
So Structuralism is how we make meaning in the world,