Trait-based frameworks, excluding the Freudian approach, were suggested by James Barber (1930–2004) in "The Presidential Character" (1972) who highlighted the importance of psychobiography in political personality analysis. Barber suggested that leadership personality comprised three dimensions; "character", "world view", and "style". Barber also proposed that leadership typology followed a pattern leading from an individuals first political success and that it is includes two variables; the effort that a leader puts in and the personal satisfaction that the leader gains. This typology is fairly limited in its dimensions.