Differences of three genres

There are three different genres that I recently heard about. They are naturalism, realism and modernism.First of all what is a genre? A genre is basically a bunch of catorgeriz3d groups of things. Let's take music. There is hip-hop, rock, metal, old school and whole lot more. They are all their own genres because all the songs in each category are similar in some way. Now the 3 genres i want to talk about. Naturalism is fictional, the characterns are often lower class citizens, inspire people by spiritual reasons (ethos), and are driven by unnatural powers. Realism is where the characters are held accountable by their decisions, self-detrrmined, live in an interior world, and are often phycologically complex. Modernilism is fictional, often a poetry or short story, showed the destruction, blood and basically everything bad that happened after world war one.