In a history of philosophy in the twentieth century christian delacampagne reviews the disciplines divergent and dramatic course and shows that its greatest figures even the most unworldly among them were deeply affected by events of their time. In a history of philosophy in the twentieth century christian delacampagne reviews the disciplines divergent and dramatic course and shows that its greatest figures even the most unworldly among them were deeply affected by events of their time from ludwig wittgenstein whose famous tractatus was actually composed in the trenches during world war i to edmund husserl and martin heidegger one who found himself barred from public life with hitlers coming to power the other a member of . 20th century philosophy saw the development of a number of new philosophical schools including logical positivism analytic philosophy phenomenology existentialism and poststructuralism in terms of the eras of philosophy it is usually labelled as contemporary philosophy succeeding modern philosophy which runs roughly from the time of rene descartes until the late 19th to early 20th centuries. In a history of philosophy in the twentieth century christian delacampagne reviews the disciplines divergent and dramatic course and shows that its greatest figures even the most unworldly among them were deeply affected by events of their time