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1 gen 1862 anni - Safety Valve Theory

Descrizione:

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

Aggiunto al nastro di tempo:

period 6

ByAshley Wright

3 feb 2020

0

0

329

Data:

1 gen 1862 anni

Adesso

~ 163 years ago

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