David Beasley said in an interview with The Associated Press this week that 19 countries are now in "protracted conflict" - which is "more conflict than we've ever had" - and 80 percent of the World Food Program's funds are now going into conflict regions.
For many years, he said, the number of people facing extreme hunger fell despite the increase in global population, but in the last few years the number of people facing extreme hunger has increased from 777 million to 815 million in 2016 - "all because of man-made conflict."
In 2015, world leaders adopted new U.N. goals, first and foremost to eradicate extreme poverty - people living on less than $1.25 a day - in all countries by 2030.
"Zero hunger by 2030? It's a joke without ending the conflicts," Beasley said. "If we end the conflicts, with the expertise and the food sector of the world, we can end world hunger."
Beasley said he has recently visited many countries in conflict - Congo, Central African Republic, South Sudan, Yemen, Syria and Somalia.
"It's a disgrace on humanity, the number of innocent victims of conflict, children, that are starving to death because of nothing but man-made conflict," he said.
When he met Ugandan President Yoweri Museveni, whom he called "the grandpapa" of the east African region, Beasley said Museveni asked how much money the World Food Program was spending in South Sudan.
"I said, 'it's around a billion dollars'. I said, 'How'd you like to have a billion dollars for roads and infrastructure, for development in Uganda?'" Beasley said.
"It's just being poured down the tube and nothing to show for it. We're keeping people alive, and that's a wonderful thing, but how long can you sustain that?" he asked.
Beasley said he thinks it was "a game-changer" for Museveni, realizing how much money was not being used for development and to promote jobs and opportunities in developing countries because of conflicts.
He urged powerful nations around the world to work with the United Nations to end conflicts.
"Why don't we put our heads together and have a comprehensive strategy and end just one? And then we'll go to the next one, and then within a year we've ended two or three wars, saved us hundreds of billions of dollars," Beasley said. "Let's end Yemen or Syria or South Sudan. Let's end something."
In the meantime, Beasley said, WFP needs between $6.5 billion and $6.8 billion this year to feed over 80 million people.
While many world leaders have been expressing concern that the Trump administration might withdraw from international humanitarian operations, Beasley said, "now I can make the case with clarity that the United States has not stepped back - it's stepped up."
Traditionally, he said, the U.S. has provided about 30 percent of WFP's budget, but this year he speculates that the Trump administration will contribute 35-40 percent, "up to maybe $2.5 billion."
Beasley said he had argued to Congress and the administration that "if you want to spend another half a trillion dollars on military operations in the United States budget, cut the World Food Program, because the World Food Program is the first line of offense and defense against extremism."
"I said, 'you must understand, this is not just some liberal feel-good program. This program is in the United States' national security interest, and it's the right thing to do."
Over the next 12 months, Beasley said, he's going to be identifying "which countries can do more and should do more."
He named several targets, starting with the Gulf states which he said "ought to pick up the humanitarian consequences of the wars and conflicts in their region, whether you're talking about Syria, Iraq or Yemen."
Next on his list was France, which gives WFP $30 million.
"Come on," Beasley said, "and how many Francophone countries are strategically aligned with France that have serious (humanitarian) issues? They ought to give several hundred million dollars."
He said Russia and China are doing more - but they can both contribute much more.
When countries like the United States, United Kingdom and Germany pick up the tab for humanitarian disasters, which they are doing, Beasley said, "that deprives development and other humanitarian support in countries that are not at war."
"So we're actually rewarding countries for being at war, and taking from countries that need our help like the Sahel region right now," he said.
Beasley warned that if humanitarian and development dollars aren't invested effectively now in the Sahel, which he called "the next battleground," extremist groups including al-Shabab, Boko Haram and the Islamic State are going to destabilize the region.
"And then, you're going to have mass migration, and it'll make what you've seen in Europe the last five or six years look like a picnic in the park," he said.
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