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?
No, there is never going to be an end to anything like that, bitcoin will just offer a better environment for the economy to flourish that is all, but there is still going to be income inequality and poverty all over the world, you must understand that there is not an easy solution to those problems because if there was then we would have solved those issues centuries ago.