Louis Althusser was a grown-up who thought a lot about how societies work. He wrote books and talked to other grown-ups about big ideas called philosophy and politics.
Althusser believed that people are shaped by the society they live in, and that society is made up of different groups of people who have different jobs and beliefs. He called these groups "classes."
Althusser thought that some people have more power and money than others because of the class they belong to. For example, a rich person might have more power and influence in society than a poor person.
Althusser also thought that people learn how to behave in society by things they are taught, like going to school or hearing stories from their parents. He called this "ideology."
One of Althusser's most famous ideas is the "Ideological State Apparatus." This means that the government, schools, and churches all have a way of teaching people how to behave in society.
Overall, Althusser wanted people to pay attention to the way society is set up and how different groups of people have different experiences. He believed that understanding this can help create a better, more equal world.