This work is focused on the abolitionist movement in Rio de Janeiro. It offers a careful reconstruction of the movement's context and evolution in Rio, and the related formal parliamentary history. An understanding of the nature of the political parties of the Brazilian monarchy, the role of the crown, and the significance of ideology and individual statesmen has been brought to bear in order to comprehend how the regime actually interacted with abolitionism and how both the movement and the regime shaped each other as a consequence.