Again, these famines are also entirely a socioeconomic crisis, not actual lack of food. If Sudan wasn't a terribly run place at war with itself on two fronts, it would not have food shortages. If Somalia had a functioning government at any point in the preceding two decades, it would not have food shortages. Supply chain disruptions occur all the time in the global food market, but in non-basketcase countries there's enough resiliency for this to never reach anywhere near "death sentence" territory.
>What do you think these countries have in common?
Terrible authoritarian governments that buy off its impoverished populaces with a mirage of huge food subsidies, while stealing most of the wealth of their nations for themselves.