Dialogical self
Inspired by the original ideas of William James and Mikhail Bakhtin, Hubert Hermans, Harry Kempen and Rens van Loon wrote the first psychological publication on the "dialogical self" in which they conceptualized the self in terms of a dynamic multiplicity of relatively autonomous "I"-positions in the (extended) landscape of the mind. In this conception, the "I" has the possibility to move from one spatial position to another in accordance with changes in situation and time. The "I" fluctuates among different and even opposed positions, and has the capacity to imaginatively endow each position with a voice so that dialogical relations between positions can be established. The voices function like interacting characters in a story, involved in processes of question and answer, agreement and disagreement. Each of them have a story to tell about their own experiences from their own stance. As different voices, these characters exchange information about their respective Me's and mines, resulting in a complex, narratively structured self.
Morton Deutsch
In 1963 he made what would be his final move between institutions, when he started at Teachers College, Columbia University after being invited to found a new social psychology doctoral program. The two major works that resulted of his studies during this period are considered to be "The Resolution of Conflict" (published in 1973) and "Distributive Justice" (published in 1985). However he also published the book "Theories in Social Psychology" (1965) and "Applying Social Psychology" (1975) during this same period. Deutsch was the first psychologist to use the Prisoner's Dilemma to study trust between small groups or pairings of individuals. During this period his work in conflict resolution continued to grow in influence, including his differentiation between constructive conflict and destructive conflict. The impact of his work was seen both in theory and in practice—for example, in 1989 both Janusz Grzelak (a leading figure of the Solidarity movement in Poland) and Janusz Reykowski (a leading figure of the Communist Party of Poland) cited Deutsch's work as part of the infrastructure for the peaceful transfer of power from the Communists to the people.