Why did it take ninety years after the emancipation proclamation for brown vs board of education?

It took ninety years after the Emancipation Proclamation for Brown v. Board of Education due to the persistence of systemic racism, entrenched segregation laws, and the slow pace of civil rights advancements in the United States. Although the Emancipation Proclamation declared the freedom of enslaved individuals, it did not dismantle the structures of segregation and discrimination that continued to exist, particularly in education. Legal challenges and grassroots activism gradually built momentum, culminating in the landmark 1954 Supreme Court decision that declared racial segregation in public schools unconstitutional. This case reflected a growing recognition of the need for equality and justice, highlighting the long struggle for civil rights.