The book explores the evolution of human society, emphasizing that man is by nature a social being whose dominance over the earth stems from superior intelligence and the capacity for organization. It examines the doctrine of evolution, natural selection, and the relative influences of inheritance and environment in shaping social progress. Early human groups evolved from the family and the clan into the village community, the state, and the nation, with government emerging as the ultimate co-ordinating agency that maintains social control and enforces rights and duties.
Subsequent sections analyze the population and racial problems of the United States, detailing the rapid growth of the nation, the uneven distribution of inhabitants, and the historic waves of European immigration. The authors address the social, economic, and political effects of this influx, alongside persistent domestic challenges such as the status of the negro and Japanese immigration on the Pacific slope. The work underscores the vital importance of Americanization through public education to assimilate diverse groups into the democratic fabric.
Economic factors and organization form another core theme, explaining how wealth is created and distributed through natural resources, labor, capital, organization, and government. The text details the division of labor, the nature of wages, interest, rent, and profits, while addressing the role of competition, monopoly, and private property. It establishes that freedom of contract and the right to private property provide the primary economic incentives for individual and national prosperity.
The nature and forms of government are evaluated through the lens of political evolution, distinguishing between national and federal states, monarchies and republics, and true versus false democracies. The authors argue that government exists to promote the general welfare, secure civil liberty, and reconcile liberty with law. Civil rights, won through centuries of historic struggle from Magna Carta onward, require corresponding obligations of obedience, military service, and active participation in public affairs.
Finally, the mechanics of popular control are explored through public opinion, representative government, direct legislation via the initiative and referendum, and the civil service system. The text outlines the structure of political parties, the role of nominations and primary elections, and the operation of local government entities such as counties and rural communities. Throughout, the authors maintain that the vitality of a democratic society depends upon an informed, responsible, and actively engaged citizenry.