Diet for a Small Planet outlined some of the political issues involved. You could read that. Second, support anything which promotes better education and more independence. A lot of charities worsen the problem by promoting dependence, among other things.
Later books by the author suggested "one less hamburger" would do a lot and, iirc, about half the book is about her research into how foreign food aid made locals dependent on diets they could not afford and stuff like that.