Karl Kälin (7 June 1943 – 11 January 2023)[1] was a Swiss Psychologist.
He obtained his PhD in psychology form the University of Zurich.
He wrote several books on leadership and personnel development.
His most successful books were Sich und andere führen which was co-authored by Peter Müri and Topschrott co-authored by Rolf Fink.
Amexel is based on systems theory and humanistic psychology.