550 LIFE AS RELATED TO PHYSICAL CONDITIONS 



the earth, but perhaps none has so directly and obviously 

 influenced man's activities as has the kind of coast on 

 which he lives. Europe, with its harborful, and Africa 

 with its almost harborless coasts are in striking contrast 

 to each other. This difference between the inducements 



SAN FRANCISCO HARBOR, 

 A harbor due to a depression of the coast. 



to travel and commerce which the two continents afford 

 is one of the factors in producing the marked difference 

 in progress attained by the native peoples of the two con- 

 tinents. They stand to-day as types on the one hand of 

 economic progress and on the other, of stagnation. 



The Phoenicians, the Carthaginians, the Greeks, the 

 English, and the other great nations of the world have 



