Okay kiddo, let me explain what monopsychism is. Have you ever heard the word 'monopoly'? It means when one person or group has control over something. Now, monopsychism is a big and complicated word that means 'one soul'.
It's a belief that all people share the same soul, just like how all houses on your street share the same electricity source. This belief is often associated with the philosopher Aristotle and in some religious traditions like Christianity and Islam.
So, monopsychism says that you have the same soul as your friends, your parents, and even your enemies too. It's like you are all part of one big family, and you are all connected in a way that you can't see.
However, not everyone believes in monopsychism. Some people believe that every person has their own soul and that it's different from everyone else's.
I hope that helps you understand what monopsychism is all about!