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1 janv. 1862 - Safety Valve Theory

Description:

This theory states that when hardships occurred in Eastern states, citizens move westward to new and prosperous opportunities.

Ajouté au bande de temps:

period 6

ByAshley Wright

3 févr. 2020

Date:

1 janv. 1862

Maintenaint

~ Il y a 162 ans

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