Edwin Sutherland proposed differential association theory in 1947, which argues that criminal behavior is learned through intimate personal groups and defines criminal behavior as a learning process that can affect anyone. The theory states that individuals learn criminal techniques, motives, rationalizations and attitudes from these groups. It also claims that whether legal codes are viewed favorably or unfavorably is learned. Critics argue that it does not fully explain law-abiding families with criminal children or spontaneous criminal acts. While not complete, differential association theory emphasizes the importance of social learning and influences on criminal behavior.