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?
I think it can be a way to reduce those problems that you have stated but there are also consequences. If blockchain technology is going to be used in those countries, it will have huge changes,it can help reducing corruptions because this system poses transparency. Many other solutions have failed and maybe this one will more likely to succeed.