His learned summary of research on the Weimar Republic is mandatory reading for all students of modern German history.
In 1959 he was a participant in the first study trip on behalf of the state government of Lower Saxony for political education to Israel.
[2] Kolb wrote the book The Weimar Republic,[3] which highlights problems and trends of the ongoing research, and gives an overview of the most important topics.
Kolb has sat continuously since 1998 as a member of the scientific advisory board of the Otto von Bismarck Foundation.
In addition to being an active member, he is co-editor of the Neuen Friedrichsruher Ausgabe, a publication about Bismarck, his sons, and his employees.