According to Alexander, why did the enslavement of Africans emerge over other social groups? (The birth of slavery- new Jin crow)

Sometimes slaves are prisoners of war; while in other cultures, people convicted of crimes are sold into slavery. Still other times (as in the case of early-American slaves from Africa), societies plagued with poverty, overpopulation, or technological inferiority are either forcibly taken as slaves or willingly traded to more developed nations.

Explanation:

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the federal constitution of the united mexican states of 1824 was enacted on october 4 of 1824, after the overthrow of the mexican empire of agustin de iturbide. in the new constitution, the republic took the name of of united mexican states. it was replaced by the federal constitution of the united mexican states in 1857.