Why were the europeans unable to use native americans as slaves

How would having more railroad tracks be advantageous during a war

What is a common factor all nonprofit businesses share? they pay no income tax.they have no capital.they are national in scope.they perform charitable acts.

In the vals framework, self-expression-motivated consumers who have fewer resources and express themselves and experience the world by working on it are referred to as experiencers thinkers strivers believers makers