a their advocacy of change
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Scientist who study the ocean floor are called" oceanographer"
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Answer:
After enslaved Native American laborers began to die due to exposure to disease, European powers began purchasing enslaved Africans, who became their primary labor source. Britain sent their first slave ships to the British West Indies to work on tobacco plantations and then later sugarcane plantations.
It is of course impossible to tell how long the Constitution will last, but it seems very likely that it will last as long as the Magna Carta since it was such a revolutionary document in its own right.