Dhammasattha is a very big and difficult word, but it means a special set of rules that people in old times made to help them live together in a kind and fair way. Imagine you and your friends are playing a game, but you're all making up your own rules and not agreeing on them, which can cause arguments and fights. Dhammasattha is like a set of agreed-upon rules for how to play the game and treat each other nicely. These rules were used a long time ago in some places in the world and helped people live together peacefully. They talked about things like how to be kind to others, how to take care of animals, how to be fair in business, and how to respect the environment. Dhammasattha is just a fancy word for a helpful guidebook that people made a long time ago to help them live together better.