As the civil rights movement gains momentum in the 1960s, Martin Luther King Jr. orchestrates protests that goad President John F. Kennedy into action.

In the 1970s, women appeal to evolving interpretations of the 14th Amendment in their fight to achieve equality and control their own destinies.

After decades of setbacks, the struggle for same-sex marriage equality culminates in an Ohio couple's case taken up by the Supreme Court in 2015.