World hunger, that is not caused by a lack of food. It is caused by a lack of money, infrastructure(ie money), and dictators trying to control their populations.
Another glib unaccountable solution for you - raise taxes by 5% to pay for the extra food, usually gets individuals reassessing their principles
Yea .... I know .... the Government should pay
Food riots over the last few months around the world were caused in the main by the switch to rape seed growing for ethanol production. Ethics went spinning out the window as soon as the cash till started ringing. Hand wringing and quivering emotion gets the 'ol warm feeling going before retiring to the comfortable air conditioned bed room, but does squat to actually sort the basic issue. Never will no matter how self satisfied individuals feel about simple solutions (the latter is a myth, there's no simple solution).
The real problem is a known one, not rocket science, and frankly not solvable - Human Nature. Self survival and Self Interest, its built into the vast majority of us in one degree or another - its part of our genetic make up - and it will not change overnight. It will take hundreds of millions of nights, whatever grand theory and high ground insomnia breaking statements say otherwise.
Regards
Zy