Jared Diamond even commented on this in one of his SWPL books, but while the Dominican Republic is a poor nation, it is not the basketcase and perpetual hell-hole that Haiti is. Same island. Two completely different outcomes. What is different? The people. There is more variety on the DR side, and a different hue to the folks, but check deeper. Looking at the DNA, does it come down to one slight difference?
From the Wikipedia page on the population genetics of the Dominican Republic.
According a 2015 genealogical DNA testing, the average Dominican is estimated to be 52.15% European, 39.57% Sub-Saharan African and 8.28% Native American overall.Genetic studies of Mitochondrial DNA (MtDNA), which assesses the DNA inherited by female line, found in a 21st-century study that the Dominican Republic’s population racial admixture is primarily European and African, but there is also a noticeable Taíno element in the population. Based on MtDNA tests, approximately 15% of Dominicans are descended in strict female line to Taíno women. Another 15% have European-MENA mtDNA haplogroups, whereas most of the Dominican population, 70%, have MtDNA Maternal side of African origin, meaning that the majority of the Dominican population is descended from unions of European men with African women
Does the entire difference come down to white dads? Y-chromosome work has not been done, but considering the 52% total mix number and the 70% sub-Saharan matrilineal descent, it makes sense. The European DNA had to get there somehow, and this is an average Dominican and not the very euro appearing Dominicans like Oscar de la Renta. The population genetics for Haiti are not as European in mixture. Haiti did not enjoy the white dad effect. Haiti did a pretty good job of killing all of the white dads.
Jared Diamond has some points on the Dominicans' more favorable view of foreigners versus the kill all others immediately view in Haiti. It is a social construct, but is it really? That is a cultural viewpoint that expressed itself through government policies that invited foreigners and foreign investment. Genes and culture perform a dance, so how much of the bedrock of the policies is based on the most likely semi-mythical origin of the island's people of the dual outsider union with foreign men leading the families and island.
Same island. Two outcomes. Culture and genes constantly work together to form a society. I often laugh at what Tumblr feminists think solutions to problems would be. Bernie Sanders and Martin O'Malley are feeling the weird heat of what their party has become. #WhiteLivesMatter is now a bad thing to say by leftist politicans in any context. #KillAllWhiteMen is a hashtag on twitter that feminists of color like to push. Be careful what you wish for. Neither the DR or Haiti are paradises, but no one has ever told me about the charming time they had when their cruise ship docked in Haiti.