The United States emerged as a great industrial power following World War I -- the most powerful nation in the world, in fact.
The growth of the United States as the world's leader in industry had been proceeding rapidly already prior to the Great War (which we know as World War I). By 1900, 38% of the world's wealth was held by the United States. By 1914, the US produced as much coal as Britain and Germany combined, as well as producing over 40% of the world's iron.
But before World War I, the United States tended to take an isolationist stance toward other nations. World War I advanced the US into superpower status as a nation that used its industrial might to involve itself in global affairs.
The fifteenth Amendment covers
the right to vote regardless of color. It did not allow states from denying any
citizen the right to vote on the grounds of race, color, or previous condition
as a slave. The African American men granted the right to vote.
The main reason why the twenties are sometimes called an "age of prosperity", especially in the United States, is that "<span>A.Incomes throughout the United States grew and the middle class held most of the wealth," due mostly to speculation in the stock market. </span>
<span>The
experience of the new immigrants was different. By 1890, no more free
land was available, so newcomers found jobs in city factories. They
lived in crowded neighborhoods, where everyone shared a common language
and culture.
Hope this helped :)
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<span>Hagia Sophia is a Greek Orthodox Christian patriarchal basilica, later an imperial mosque, and now a museum in Istanbul, Turkey.</span>