Why did the world's first civilizations develop in river valleys?

Provided places to fish and hunt. Also, because when the lands flooded it then became fertile.

Explanation:

brought good soil for farming and was a good food resource

Explanation:

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

thomas jefferson is the answer