When, however, that portion of this Latin element primarily interested in the exploitation of the Western Hemisphere failed to find in the Indians the substantial labor supply necessary to their enterprises and at the suggestion of men like las Casas imported Negroes for this purpose, the missionaries came face to face with the question as to whether this new sort of heathen should receive the same consideration as that given the Indians. Because of the unwritten law that a Christian could not be held a slave, the exploiting class opposed any such proselyting; for, should the slaves be liberated upon being converted, their plans for development would fail for lack of a labor supply subject to their orders as bondmen. The sovereigns of Europe, once inclined to adopt a sort of humanitarian policy toward the Negroes, at first objected to their importation into the new world; and when under the pressure of the interests of the various countries they yielded on this point, it was stipulated that such slaves should have first embraced Christianity. Later, when further concessions to the capitalists were necessary, it was provided in the royal decrees of Spain and of France that Africans enslaved in America should merely be early indoctrinated in the principles of the Christian religion. These decrees, although having the force of law, soon fell into desuetude. There was not among these planters any sentiment in favor of such humanitarian treatment of the slaves. Unlike the missionaries, the planters were not interested in religion and they felt that too much enlightenment of the slaves might inspire them with the hope of attaining the status of freemen. The laws, therefore, were nominally accepted as just and the functionaries in the colonies in reporting to their home countries on the state of the plantations made it appear that they were generally complied with. As there was no such thing as an inspection of these commercial outposts, moreover, no one in Europe could easily determine exactly what attitude these men had toward carrying out the will of the home countries with respect to the Christianization of the bondmen. From time to time, therefore, the humanitarian world heard few protests like that of Alfonso Sandoval in Cuba and the two Capucin monks who were imprisoned in Havana because of their inveighing against the failure on the part of the planters to provide for the religious instruction of the slaves. Being in the minority, these upright pioneers too often had their voices hushed in persecution, as it happened in the case of the two monks.