You are right, some of African countries need to concentrate on tackling hunger and poverty, but come to think of it, the blockchain technology can equally play some roles even in those sphere, so it's not like reinvention of the flywheel is necessary to put them to use.

For a start the blockchain technology can be used to conduct credible elections to usher in the right candidates and do away with the vicious cycle of corrupt and nothing-new-to-offer politicians. That done, I believe every other things will start falling into place, because African main problem is its corrupt, all knowing and self righteous rulers.