Egyptian social classes had some porous borders but they were largely fixed and clearly delineated, not unlike the medieval feudal system. Clearly, the groups of people nearest the top of society were the richest and most powerful.
The completion of the first transcontinental railroad in 1869 encouraged settlement of the American west by proving easier travel and it took less time.
In the Treaty of Guadalupe Hidalgo it was stated that the Mexicans could retain their Mexican citizenship or they could stay and become a citizen of the United States.
