Okay kiddo, let's talk about a guy named Marx and his idea about what it means to be human.
Marx thinks that people are divided into two groups: workers and owners. Workers are the people who do the hard work like building things, cleaning places, and making stuff. Owners are the people who own the companies and the factories where the workers work.
Marx says that the owners don't care about the workers because they only care about making money. But the workers are the ones who actually make all the stuff that the owners sell. So, Marx thinks that this is not a fair system.
Marx also thinks that people are basically good and want to help each other out. But because of the way society is structured, people end up competing against each other instead of helping each other.
Marx believes that people's true nature is to work together and share things. He thinks that if we got rid of the idea of ownership and made everything owned by everyone, we could create a society where everyone could work together and share things fairly.
So, Marx's theory of human nature is that people are naturally good and want to help each other out, but the way society is structured makes us compete against each other instead. If we change the way society is structured, we can create a fairer society where everyone works together and shares things.