But there is always a danger that this spirit, if increased, may produce congestion. When there is too much family pride man lives only in his pride, forgetting his duty towards mankind and not recognizing anything that unites him with others beyond the limited circle of his family. When this congestion is produced in a nation it results in all kinds of disasters, such as wars and revolutions with violence and destruction. The nightmare that the world has just passed through [WWI] was the outcome of world congestion produced by the extreme of this same spirit.