What justifications did Americans have for the idea of western expansion?

Explanation:

Gold rush and mining opportunities (silver in Nevada)

The opportunity to work in the cattle industry; to be a “cowboy”

Faster travel to the West by railroad; availability of supplies due to the railroad.

The opportunity to own land cheaply under the Homestead Act.

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."