The Federal Government of the U.S.A. Came into existence on:

The Federal Government of the U.S.A. Came into existence on:
April 30,1787
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May 30, 1788
June 30,1788
April 30,1789

The Americas changed from continents inhabited by people of mongoloid stock to:

The Americas changed from continents inhabited by people of mongoloid stock to:
All of these
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The most racially mixed region of the world
Completely Indo-European Stock
Majority Negroid Stock