This pamphlet on the slave colonies of the West Indies argues for the immediate emancipation of the slaves. It also claims that maintaining extensive colonial power structures is costly, inefficient and potentially fatal to Britain, citing the decline of the Spanish and Portuguese empires, as well as the example of Saint Domingue. He concludes that the slave colonies of the West Indies as run by the planters are "a system founded in crime, and productive of merited ruin" (19).