Who developed the concept of the dialogical self?
Harry Kempen
In the 1990s, Kempen and Hubert Hermans developed a new approach in cultural psychology around the concept of the dialogical self. In 1993, they published the seminal work "The dialogical self: Meaning as movement", and published several articles in "American Psychologist", "Journal of Personality" and "Theory & Psychology". Despite their success Kempen suffered from depression. In 2000, he died in Nijmegen four days before his retirement from the Radboud University. At the university he is remembered by as the "personification of cultural psychology."Articles, a selection:
Centre for World Dialogue
The Centre was founded by Hossein Alikhani and his wife Jila Faramarzi in 1996. 
Its conception is based on the premise that global dialogue can bring individuals from diverse viewpoints face to face with one another in the hopes of reaching vital consensus on issues of global concern.