I don't see how bitcoin is helping people in Africa getting food or avoiding wars.
You"re right in that point due to severe poverty happening particullarly in Africa,poverty leads to war because some people who are greedy and uncontented on what they have.Also because of war caused by poverty that may also leads to starvation,famine and lack of food.It is impossible for Bitcoin to end the world poverty but for some instances maybe Bitcoin might lessen the count or number of people we can consider as poor people.