Literally "middle place" — the French concept that your surroundings shape who you are, an idea that launched both naturalist literature and modern sociology.
The social environment or surroundings in which a person lives or operates.
From French milieu meaning middle, medium, environment, from mi (mid, from Latin medius) and lieu (place, from Latin locus) Key roots: medius (Latin: "middle"), locus (Latin: "place").
The French naturalist writer Émile Zola made milieu central to his literary theory, arguing that characters are products of their milieu — their social environment determines their fate. This idea, borrowed from Hippolyte Taine, became the foundation of literary naturalism and anticipated modern sociology.