[291] which also is so important in a world which has lost older types of authority and is looking for new types, the question of authority generally, the different types of it---here again psychology, theology and ethics work together and often against each other. Then very special problems of social ethics: family relations and sex relations. After ethics we come to economics,^a the meaning of economy in, for instance, a term like

economic materialism. This leads immediately to the problems of religion and the social gospel, religion and religious socialism; the basic ideas which have developed in many periods of history---their limitations and their meaning. We then come to the political^b realm, but first in a more fundamental way, and I repeat the title of a book of mine, only in the opposite order: Justice, Power and Love---the question of the law-school problems in relationship to theology. Then come the last lectures, religion and the political systems: democracy, totalitarianism, conservatism, feudalism, aristocracy, and many others. Then the great problems---which 20 years ago was almost the only problem in theology---namely religious pacifism, the question of peace, in religion.

Finally, if we are able to do it, I want to conclude the whole problem with the relation of state and church. This is the outline, and of course I am willing to enlarge or shorten any of these realms. This depends largely on the intensity of your questioning or the interruptions of other newly-invented holidays! [some laughter]