What geographic factor has benefited trade in africa and the middle east

Why did leaders such as siddhartha gautama abandon hinduism to createbuddhism around 500 bce:

The 14th amendment overruled the supreme court case of dred scott vs. sandford. the landmark supreme court case determined which of the following points? a.slaves could not be citizens b.non-landowners could not be citizens c.blacks could not be citizens d.all persons born or naturalized in the united states vary differently in citizen status.

European expansion into africa left native regimes intact but had a strong impact on local societies what does this mean