Edwin Sutherland proposed differential association theory in 1947, which states that criminal behavior is learned through intimate personal groups and defines crime as a learning process that can affect anyone. The theory has several key principles: 1) criminal behavior is learned from interactions with others who encourage law-breaking, 2) this learning includes how to commit crimes and rationalize them, and 3) how individuals view legal codes is learned from others. Critics argue it does not fully explain why some from law-abiding families commit crimes or account for spontaneous deviant acts. While not complete, differential association emphasizes the importance of social influences on criminal behavior.