Emmanuel Todd is a smart man who studies how different groups of people in the world behave and how they relate to each other. He's like a detective trying to solve a mystery about why people do things the way they do.
He looks at things like religion, culture, and politics to try to understand why people think and act certain ways. He also studies how families and societies are organized and how that affects their behavior.
Emmanuel Todd has written books and articles about his findings, and many people think he is very smart and interesting because he helps us understand how the world works.