We studied the impact of social movements on political institutions such as the Courts and Congress by exploring details of Martin Luther King's "Letter from Birmingham Jail", Plessy v Ferguson and Brown vs Bd of Education. I discussed King's rationale for defying certain laws that he considered immoral and therefore unjust and a violation of Natural Law . In this context, I reviewed the concept of Natural Law as it appears in the writings of John Locke and the Declaration of Independence and noted how in the AP exam one can connect King's essay to the Declaration in their reliance on "natural law and natural rights.". I then discussed the holding in Plessy v Ferguson and the Supreme Court's reversal on Plessy in Brown. Of interest while the Court held that segregation in schools violated the equal protection clause, most of the Court's rationale was founded in the deleterious psychological and social impact segregation inflicts on African-American children. I discussed how the Court avoided too much discussion of the 14th Amendment because historically it is doubtful that the states and Congress intended the 14th Amendment to abolish school segregation that was legal and pervasive at the time the 14th Amendment was ratified. I then discussed the implementation of Brown by school busing .