Poverty, legal identity etc. are major concerns in the third-world countries. Data says one-third of children in the world still lack legal identity (sourced from Informationweek). Poverty and lack of food still kill thousands of people. Can Blockchain put an end to all this?
Blockchain is not a magic wand that we can wave to eliminate these basic, yet persistent problems. Poverty, for example, is a product of many factors like lack of education and unpleasant environment. Blockchain must first eliminate this factors to finally erase poverty--I don't see that happening.
Poverty is the reason the world is made for the rich. They are interested in making it more poor. It's easier to find people who can work for little money. This situation is achieved by manual control of the money supply and corruption. Bitcoin can change the balance of power. That's why bankers and oligarchs are against cryptocurrencies.