Marxist studies in the history of philosophy are based on the assumption that all philosophical schools and currents fall into two main traditions, materialism and idealism, and that the whole of the history of philosophy can be described as an opposition between the two. Lenin observed that this distinction goes back to antiquity, and that even then the "tendencies "l of Democritus and Plato were already in evidence.

'The world is tragically splendid in its fragmentedness. Its harmony lies in its disharmony, its unity in its enmity. Such is the paradoxical doctrine of Heraclitus, subsequently paradoxically developed by Friedrich Nietzsche into the theory of 'tragic optimism."'.

A general problem of philosophy concerns the possibility of objective knowledge of other cultures (including past cultures), and the adequacy of their reconstruction. The problem of cultural development is also crucial. In this paper, I argue that a culture which has expanded its potentialities in various independent forms is an open culture capable of entering into dialogue with other cultures.