Marx was a thinker and writer who lived in the 1800s. He believed that the world was divided into two classes, the rich and the poor. The rich were the people who owned businesses and had a lot of money, while the poor were the people who worked in the businesses and didn't have much money. Marx thought that the rich were taking away too much of the money and resources that should be shared between everyone. He thought that the people should get together and try to make things fairer, so that everyone could have reasonable incomes and a reasonable level of comfort.