Preface and Acknowledgements

This historical overview traces the history of IASSW through portraits of the sequence of its presidents. The history of this organisation is not only connected with major phases of the history of the 20th century but also partly with my own history as a member and teacher of a historically rooted profession and discipline. I was inspired to commission this series of portraits by my numerous encounters with international colleagues and their rich and diverse contributions to the continuous development of our discipline.