In 1865 Slavery is abolished in the United States by the 13th Amendment to the Constitution.
In 1905 the laws known as "Jim Crow" are formally established, a formal and informal system of racial segregation in all aspects of life was built in the southern states of the United States. Segregation and informal racism continue in the northern states.
From 1910 to 1960 the "great migration" of African Americans from the southern United States to the northern and eastern cities took place.
Steel. During the industrial revolution, steel had a major increase in production. A way to remember this is to remember the man Carnegie Steel who ran a monopoly that controlled the steel industry during the Industrial Revolution.
