From First To Last The Civilization Of

The Negro, However, Has Been Tested On An Extensive Scale.

Thus The Races, Though Alike In Their Physical Response To Climate, May Possibly Be Different In Their Mental Response Because They Have Approached America By Different Paths.

The Human Organism Inherits So Delicate An Adjustment To Climate That, In Spite Of Man's Boasted Ability To Live Anywhere, The Strain Of The Frozen North Eliminates The More Nervous And Active Types Of Mind.

As A Matter Of Fact, An Ordinary Desert Supports A Much Greater Variety Of Plants Than Does Either A Forest Or A Prairie.

History In Its Broadest Aspect Is A Record Of Man's Migrations From One Environment To Another.