The abolition of slavery in the nineteenth and twentieth centuries was a long process. In terms of the economic views of abolitionists, there has been an excessive focus on the economic ideas of liberal abolitionists and their approach to Civilization, Christianity and Commerce. However, there was a “developmental abolitionism” which has received little attention. Afro-American Martin R. Delany and Liberian James S. Payne were writers who approached abolitionism through this developmentalism. They favored more interventionist measures at building the material power and national autonomy of black nations to undercut the power of slave-using African chiefs, to provide indigenous Africans with employment, and to undermine the profitability of slave-based cotton production in the Americas. They also implicitly and indirectly approached labor scarcity with solutions ranging from promoting labor-saving technology to cultivating national prosperity that would improve emigration to Africa or increase birth rates.