The significance of the Montgomery Bus Boycott for civil rights activism was immense, as it marked one of the first large-scale demonstrations against racial segregation in the United States. Sparked by the arrest of Rosa Parks in 1955, the boycott lasted over a year, mobilizing the African American community to refuse bus services. This grassroots movement propelled figures like Martin Luther King Jr. into the national spotlight and demonstrated the potential for organized, nonviolent protest. Ultimately, the boycott led to a Supreme Court ruling declaring bus segregation unconstitutional, serving as a catalyst for broader civil rights initiatives in the following decade.