Mario Tronti is a name of a very important grown-up man who has studied and written about how people work and create things together in a society. He is from Italy, a country far away from ours, but it doesn't mean that what he did and discovered is not important for us to understand.
Now, let's imagine that you and your friends decided to build a really cool fort in your backyard. To do that, you will have to figure out what materials to use, who will do what, how to put everything together, and what kind of games you can play inside it. You will also have to make some rules, such as who can enter the fort, and who has to knock first, and so on.
This is kind of what Tronti was interested in, but instead of little kids playing, he was studying how grown-ups who work together can make really cool things, such as buildings or even whole cities. He wanted to understand how groups of people work, and the roles that they have, and how they share ideas and make decisions.
He discovered that people are very important in shaping the world, and that they can make big changes happen by working together. He also said that workers or employees are not just a small part of a business or a factory, but they are the key to making it work. He believed that they have the power to change things, even if they don't always realize it.
So, in short, Mario Tronti was a grown-up who studied how people work together to create things, and he noticed that all people, even workers, have power and can make big changes happen.