How is the Jim Crow laws an example of a primary source

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Explanation:

in U.S. history, any of the laws that enforced racial segregation in the South between the end of Reconstruction in 1877 and the beginning of the civil rights movement in the 1950s. Jim Crow was the name of a minstrel routine (actually Jump Jim Crow) performed beginning in 1828 by its author, Thomas Dartmouth (“Daddy”) Rice, and by many imitators, including actor Joseph Jefferson. The term came to be a derogatory epithet for African Americans and a designation for their segregated life.

From the late 1870s, Southern state legislatures, no longer controlled by so-called carpetbaggers and freedmen, passed laws requiring the separation of whites from “persons of colour” in public transportation and schools. Generally, anyone of ascertainable or strongly suspected Black ancestry in any degree was for that purpose a “person of colour”; the pre-Civil War distinction favouring those whose ancestry was known to be mixed—particularly the half-French “free persons of colour” in Louisiana—was abandoned. The segregation principle was extended to parks, cemeteries, theatres, and restaurants in an effort to prevent any contact between Blacks and whites as equals. It was codified on local and state levels and most famously with the “separate but equal” decision of the U.S. Supreme Court in Plessy v. Ferguson (1896). and they are an example because it was dated al long time ago in history and helps us know what happened in the past of countries and america

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.

d.)   when the us left nato after the end of the cold war and they had to evolve to focus on more humanitarian measures with the smaller budget