Also, it also suggests that because forced slavery was not widely practiced on the island, a notion of solidarity could have existed amongst the Puerto Rican people during the 19th century. .
Unfortunately, the details surrounding the island's social and economic structure at that particular time prevent its history from serving as a model for national unity. In the 1840s, sugar became very important in the international market. New technologies resulted from both the European and American Industrial Revolutions, and as a result, sugarcane producers were able to process their crops more efficiently. This dramatic increase in the consumption of sugar cane created a greater demand for labor by the Spanish Empire, transforming Puerto Rico from a dependent colony on the outskirts of an empire, to a profit-making enterprise. A question exists though, did an alternative free labor force exist in 19th century Puerto Rico to substantiate the claims that African slave labor was not important to its sugar economy?.
Evidence suggests that the native population could not fulfill the economic goals of the Spanish Empire. Scarano claims that "the haciendas needed a mass of inexpensive disciplined workers, and for nearly three decades after 1815, the African slave trade satisfied that demand. Except on very small farms using a balanced combination of slaves and jornaleros, slaves constituted the majority of sugar workers in the principal producing districts until well beyond the middle of the century". These ideas demonstrate that modern constructions of Puerto Rican heritage are incomplete without a discussion of the strong African heritage in Puerto Rican culture. .
Internal domestic conditions concerning Puerto Rican labor discipline problems also contributed to the large importations of African slaves. The large "hinterland" area of central Puerto Rico, for centuries, had created a respite for free population in which they could live their day to day lives fairly free from Spanish rule.