How did King Arthur help improve English society?

*...and therefore, did not exist except in the minds of people. *However, there is other evidence that claims King Arthur was indeed a real person. In that case, his contributions to society would probably include such things as chivalry, preservation of the Briton's way of life and so on. *Even a fictional King Arthur in the minds of people probably influenced them to perform acts and have thoughts inspired by the Arthurian legends. *To that end, Sir Winston Churchill once said something to the effect of, "If there was not a King Arthur, there should have been."