I believe it’s the Gulf of Mexico. Not 100% certain
The Civil Rights Movement convinced scholars that some social movements do not result from a unification of psychological needs but need to be explained by a broader socio-economical perspective. In such an explanation, the needs of the individuals do not have to coincide with the needs of the group as a whole.
The rights and the privileges of freedmen were still threatened after the civil war because laws were still made to regulate their activities. The black codes law were enacted which controlled the way a freed man can live; strict restrictions were placed on them, they can not vote, serve on jury, travel freely or engage in occupation of their choice.
Hope this helps.
The most important factor in making Mesopotamia's farmland fertile was the river that ran ran through it and flooded annually.