Franz Oppenheimer was a very smart man who lived a long time ago. He had a big idea about how people live and work together in groups.
Think about when you play with your friends. You might all agree to take turns on the slide, or agree to play a certain game together. This is like a group agreement. Oppenheimer said that groups of people, like families or towns, do this too.
He said there are two ways that groups come together: by asking nicely, or by taking what they want by force. When a group asks nicely, they might all agree to help each other out and take turns doing different tasks. When a group takes what they want by force, like a big bully, they might be mean to others to get their way.
Oppenheimer said that the group that uses force is never as strong as the group that works together nicely. He believed that people should work together nicely to make sure everyone has what they need. That way, everyone can live together happily and everyone gets what they need.
Oppenheimer was a very smart man and had a big idea that people should work together nicely to be happy. That's a very important idea to remember no matter how old you are!