Contributive justice is something that helps us all work together more fairly. It means that everyone should be doing their part in making the world a better place. Think of it like a puzzle—each piece (person) should help put the puzzle (society) together. Everyone's part is important, and if someone doesn't do their part, it doesn't work as well. So, each person should do their best to contribute to the world, no matter how big or small their contribution is.