Michel Foucault was a French philosopher who lived from 1926 to 1984. He wrote about different subjects such as power, knowledge, and oppression. He believed that power was not just something that some people had and others didn't, but that it is present in any society and it works like a system. He looked at how power affects us, on who gets it, how it is used, and how people try to resist it. He also examined how certain knowledge or ideas become accepted or allowed, and how people use them to oppress different groups or to maintain their own power. His work has had a major influence on many fields, including sociology, law, and psychology.