18 mar 1887 ano - The Puerto Rican Peasant published
Descrição:
 - francisco del valle atlies (dr)
- racial heritage, immorlaity, lack of health, poverty main obstacles to islands progress and modernization
- not into racial mixing, BUT htought jibaros of the interior were pure white and thorugh civilization andblood could over-power blackness (and therefore immorality, sickness, etc.) (crit colonist for letting racial mixture happen and for making peasants subservient)
- saw PR as class society
- link sickness to environment (tropics) 
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