The document provides biographical information about influential political scientist Harold Dwight Lasswell. It notes that Lasswell made major contributions to contemporary behavioral political science through over 30 books and 250 scholarly articles covering diverse subjects. It discusses his educational background, major publications including "Politics: Who Gets What, When, How", his teaching career including positions at Yale University, and his death in 1978. The document also summarizes Lasswell's influential model of communication, which identifies the key elements of who says what through which channel to whom with what effect.