In view of our modern highly specialised system of knowledge with its millions of books preserved in highly valued libraries, further with all the specialised disciplines and subdisciplines of our modern humanities, it seems absurd to speak of a 'theory of culture'. But, everyone familiar with this huge system of knowledge will also know about its weaknesses. The Middle Ages had a world view based strictly on written history. Today this world-view competes with a tremendous amount of contradictive scientific facts and to many it is quite questionable as to whether the written history really earns the reliability attributed by others.
History necessarily excludes a lot.
If suddenly this formerly excluded enters into view it can question fundamentally what was believed because it was written. Too large are the discrepancies between what can be handled as something particular and the cultural totality. Consequently there are always surprising things happening. We are content therefore with a knowledge 'from day to day' which articulates itself in the dramatical hectics of the media. They legitimate an endless pluralism, which, theoretically should be excluded apriori if we speak of man and his culture.