Insularity of the land-masses--Classification of land-masses according
to size and location--Effect of the size of land-masses--Independence
due to location versus independence due to size--Continental convergence
and ethnic kinship--Africa's location--The Atlantic abyss--Geographical
character of the Pacific--Pacific affinities of North America--The
Atlantic face of America as the infant Orient of the world--The Atlantic
abyss in the movements of peoples--Races and continents--Contrast of the
northern and southern continents--Effects of continental structure upon
historical development--Structure of North and South America--Cultural
superiority of Pacific slope Indians--Coast articulations of
continents--Importance of size in continental articulations--Peninsular
conditions most favorable to historical development--The continental
base of peninsulas--Continental base a zone of transition--Continental
base the scene of invasion and war--Peninsular extremities as areas of
isolation--Ethnic unity of peninsulas--Peninsulas as intermediaries.