The important characteristic of plains is their power to facilitate every phase of historical movement; that of mountains is their power to retard, arrest, or deflect it. Man, as part of the mobile envelope of the earth, like air and water feels always the pull of gravity.


Influences of Geographic Environment

Ellen Churchill Semple Quotes

The important characteristic of plains is their power to facilitate every phase of historical movement; that of mountains is their power to retard,...

The important characteristic of plains is their power to facilitate every phase of historical movement; that of mountains is their power to retard,...

The important characteristic of plains is their power to facilitate every phase of historical movement; that of mountains is their power to retard,...

The important characteristic of plains is their power to facilitate every phase of historical movement; that of mountains is their power to retard,...