What nationality was the man for whose fiftieth birthday the book Minima Moralia was originally written for ?
Minima Moralia:  It was originally written for the fiftieth birthday of his friend and collaborator Max Horkheimer, who had co-authored the earlier book "Dialectic of Enlightenment" with Adorno. Max Horkheimer: Max Horkheimer (February 14, 1895 – July 7, 1973) was a German philosopher and sociologist who was famous for his work in critical theory as a member of the 'Frankfurt School' of social research.
German