"To be a history in the true sense of the word, the work must be the story of the people inhabiting a country. It must be a record of their life from age to age presented through the life and achievements of men whose exploits become the beacon-lights of tradition; through the characteristic reaction of the people to physical and economic conditions; through political changes and vicissitudes which create the forces and conditions which operate upon life; through characteristic social institutions, beliefs and forms; through literary and artistic achievements; through the movements of thought which from time to time helped or hindered the growth of collective harmony; through those values which the people have accepted or reacted to and which created or shaped their collective will; through efforts of the people to will themselves into an organic unity. The central purpose of a history must, therefore, be to investigate and unfold the values which, age after age, have inspired the inhabitants of a country to develop their collective will and to express it through the manifold activities of their life."