We still could, you know, if we took the Millenium Development Goals seriously.
This is the first generation in all of recorded history that can do something about the scourge of poverty. We have the means to do it. We can banish hunger from the face of the earth.
UPDATE: Just got the news that Robert McNamara has died. Part of why we didn't end hunger is because we made waging war a priority. We could say, couldn't we, that it was McNamara's war.