As a student of Popper, and carrying the memories and scars of the catastrophe of the Nazi years, he was acutely aware throughout his life of both the strengths and the vulnerabilities of our open societies.
Lecteur de Popper, marqué par le souvenir de la catastrophe nazie, il eut tout au long de sa vie une conscience aiguë des forces mais aussi des faiblesses de nos sociétés ouvertes.