People and land--Political geography--Political versus social
geography--Land basis of society--Morgan's _societas_--Land bond in
primitive hunter tribes--In fisher tribes--In pastoral tribes--Land and
state--Strength of the land bond in the state--Evolution of land
tenure--Land and food supply--Advance from natural to artificial basis
of subsistence--Land basis in relation to agriculture--Migratory and
sedentary agriculture--Geographic checks to progress in economic and
social development--Native animal and plant life as factors in
progress--Density of population under different cultural and geographic
conditions--Its relation to government--Territorial expansion of the
state--Artificial checks to population--Extra-territorial relations of
state and people--Theory of progress from the standpoint of
geography--Progressive dependence of man upon nature.