Final answer:
Between 1900 and 1920, a significant number of Confederate monuments were erected as Jim Crow laws reinforced racial segregation and white supremacy in the United States.
Step-by-step explanation:
Reform came with the Civil Rights movement of the mid-20th century, challenging and altering the established racist paradigms.
The period between 1900 and 1920 marked an era where the segregation laws, known as Jim Crow laws, began to tighten their grip on the Southern United States. During this period, a substantial number of Confederacy monuments were erected, aligning with a movement to glorify the Confederate cause and reinforce white supremacy amidst increasing racial segregation and disenfranchisement of African Americans. The creation of segregation laws corresponded with a rise in assertiveness and economic self-sufficiency among some parts of the Black community in the South, leading to a reactionary pushback. Concurrently, a significant migration of African Americans to Northern states, acknowledged as 'The Great Migration', led to patterns of 'White Flight' and continued de facto segregation in the North, even as de jure segregation was afflicting the South.