Marxism is the theory, named after Karl Marx, that basically tells us that people in the world are essentially put into different categories and classes based on their background and relationship to how things were made. That every person is put in the position that they are now due to their upbringing. There is the "working class", and they are the individuals that make a living working on farms or in factories. I believe you can define them as the lowest class. And then there are the "capitalists" who as some what above the working class but not by much. They are the ones that are owners of these farms and factories that the working class works on/in. Then last but not least, there is the ruling class. The "Donald Trumps" and "Bill Gates" of the world. The ruling class are the people that pretty much own and live off of the smaller classes. Marx states that there will always be a struggle between the rich and the poor, and with corporations vs the public. If you think about it, it all is actually very much true still to this day. It's very easy to break down media with marxism, actually. For starters, you know that every character in a movie, TV show or play represents a certain type of person. If you are picturing a blonde hair jock, who constantly has women all over him, what would you think of that person? That he is popular. Maybe even rich if you manage to get a glimpse of his car in a scene. You are basically digging deeper into the character and analyzing their life. I think Mean Girls would be a perfect (and popular) example of this theory. Especially when they describe the social classes within the school.