Who created the racial hierarchy system that favored European Americans over minorities and led to the creation of "redlining" neighborhoods?

In 1517, the spanish friar bartolomé de las casas, disturbed by the suffering which spanish conquistadores had wrought on the native populations of america, became an important advocate of

What role did the catholic church play in the development of the heliocentric theory promoted by copernicus and galileo?

Describe the relations between the united states and other countries under the articles of confederation. 3-4 sentences