Social science that focuses on decision making

they died because of a disease during the first spanish colonies.

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others  

it proved indian land claims were unjustified.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.