Loose the land for other things and then starts more land and room for slavery
In 330 AD, Constantine, then the emperor of the Roman Empire, moved the seat of power to Constantinople. Then, Constantine founded a "second Rome" (the Byzantine Empire). The city was strategically placed on the trade routes between Europe and Asia, and the Mediterranean Sea and the Black Sea, making it ideal for trade and travel.
Inventions of the electric light, steam engine and railroads helped in the growth of U.S's Industrial boom in the 1900s during the Industrial Revolution bringing a rise for more labor. The invention of the railroad system, for example, made it possible to transport goods over long distances or a short period resulting in the creation of more jobs in various industries (Mantoux, 2013). These inventions of the industrial revolution affected workers, i.e., workers were paid poorly, child labor was introduced, cities were crowded and filled with diseases (Nelson, 1996).
Mantoux, P. (2013). The industrial revolution in the eighteenth century: An outline of the beginnings of the modern factory system in England. Routledge.
Nelson, D. (1996). Managers and workers: origins of the twentieth-century factory system in the United States, 1880–1920<span>. Univ of Wisconsin Press.</span>
A lot of people were depressed because a lot of young boys died and there were a lot of parents who lost their boy(s). Plus, there were a lot of girls who didn't have a spouse so that kind of or alomst threw off the balance of humanity.
The correct answer to this could be the liberal capitalism built on democratic beliefs. This ideology best corresponds to the "American Dream". Everyone is equal and everyone can achieve everything.