When Justice is considered in Philosophical terms one will sometimes think about Deserts. Deserts basically raise the qeustion "did he/she get what they deserved".
1. Don't you mean "desserts"? Spelled with a double 's'. Also, the term is "just desserts" not "sometimes desserts", fyi.
2. Either way, that and justice are not proper nouns so please stop capitalizing them.
Capitalism's effect on third world nations largely depends on whether or not they accept capitalism and whether their government is capable, competent, and willing enough to do what is necessary to work with such a system. If those conditions are met, the nation in question will likely modernize. Some parts of modernization will initially produce some bad effects (take China's pollution problem for instance) but once enough wealth has been generated in the nation that country will more than likely be willing to spend a little extra to lessen those problems. The full benefits are largely something that will come to the population in time, perhaps even over many generations, but they generally will come.
Compare this to nations whose governments vehemently reject capitalist principles. Even if they attempt to modernize the mismanagement is so great that the benefits are minimal at best. Take North Korea for example.