Write a 1-2 paragraph essay that explores and analyzes the successful overthrow of institutionalized segregation. Be sure to discuss the effects of activism at the grassroots level and the efforts of elected officials in your response.

Use the context:
Brown v. Board of Education.

The successful overthrow of institutionalized segregation in the United States can be traced back to the landmark Supreme Court case of Brown v. Board of Education in 1954. The ruling overturned the "separate but equal doctrine" established in Plessy v. Ferguson and paved the way for integration of public schools. Grassroots activism played a significant role in the fight against segregation, with organizations such as the National Association for the Advancement of Colored People (NAACP) leading the charge. However, it was the efforts of elected officials like President Lyndon B. Johnson who signed the Civil Rights Act of 1964 into law that truly dismantled the legal framework of segregation. The act prohibited discrimination on the basis of race, color, religion, sex, or national origin and marked a historic victory for civil rights activists in their fight for equality. The successful overthrow of institutionalized segregation is a testament to the power of collective action and the importance of political leadership in the pursuit of justice.