Answer:
The Naturalization Act of 1790 limited the United States citizenship to white people, and eight presidents in office had owned slaves prior to the American Civil War. Nearly four million black people were still held in slavery in the South.
Three constitutional amendments were passed after the Civil War, including the 13th Amendment (1865), which abolished slavery, the 14th Amendment (1869), which granted citizenship to persons of color, and
Southern states passed new constitutions and laws between 1890 and 1908 in an effort to deny voting rights to African Americans and many Poor Whites. As a result, the number of people who could vote was drastically reduced.
At the same time as African Americans were losing their right to vote, white southerners enacted laws requiring racial segregation. Through the turn of the century, there were numerous lynchings and a rise in violence against black people.
Outside of the South, black people's circumstances were marginally better (in most states they could vote and send their children to school, even if they still faced discrimination in housing and employment).
Overall, systemic discrimination against blacks was prevalent in Northern and Western cities and affected many facets of daily life. Black people's economic chances in the workforce were restricted in their prospective mobility and funneled to the lowest status.
Black military veterans after both World Wars fought for full civil rights and frequently served as the movement's leaders. Executive Order 9981, signed by President Harry Truman in 1948, outlawed segregation.
After Brown, the civil rights movement's defining tactics of public education, legislative lobbying, and litigation were expanded to include "direct action" tactics like boycotts, sit-ins, Freedom Rides, marches or walks, and other methods that rely on crowdsourcing, nonviolent resistance, standing in line, and, occasionally, civil disobedience.
Black students in Virginia protested the state's segregated school system in the spring of 1951 over their unfair treatment. Students at Moton High School demonstrated against the overcrowding and outdated infrastructure.
The first Southern community to openly declare its adherence to the Brown v. Board of Education decision was Greensboro, North Carolina, on May 18, 1954.
Since the late 19th century, statutory and constitutional reforms in Mississippi have deprived Blacks of their right to vote. In order to show that black Mississippians wanted to vote, COFO organized a Freedom Ballot in that state in 1963. In the fake election, which put an integrated slate of candidates from the "Freedom Party" against the actual state Democratic Party candidates, more over 80,000 people registered to vote.