 Complete the following phrase:  Shifting imperial and economic conditions in Cuba in the first half of the nineteenth century fomented a wave of slave rebellions in the 1830s and 40s. Historians differ on where they locate the cause of the slave uprisings of the first half of the 19th century. Some cite the intensification of plantation style farming, increasing numbers of enslaved people trafficked to Cuba during the era, and the spread of rebellious news and ideology among people of color on the island as the main drivers behind the organization and execution of La Escalera. Other historians have emphasized the impact of the neighboring Caribbean island of 