In 1969 a human walked on the moon, in 1989 the Berlin Wall fell down, in 2001 the World Trade Center in New York fell down, in 2020 a global Corona pandemic fell down on people and communities. Biological, political and corporate bodies change, and we change with them and in them: `tempora mutantur et nos mutamur in illis'.
(Hans Martin Sass, preface)
Hans-Martin Sass (* 1935 in Hagen /Germany) now lives in Reston, Virginia. He holds faculty positions in philosophy and bioethics at Ruhr University, Bochum, FRG (since 1966), and Georgetown University, Washington DC (since 1980); Honorary Professor at Renmin University (1985) and Peking Union Medical College (2001) in Beijing PRC. 100+ separate publications, 250+ journal articles, 300+ invited lectures.