Sub-Saharan Africa may be home to six of the world's 10-fastest growing economies, but it also has a majority of the countries that are suffering from a food crisis.
As the United Nations prepares to launch an ambitious post-2015 development agenda, the message from one of its Rome-based agencies is unequivocal: the eradication of hunger and malnutrition should remain a high priority when the current Millennium Development Goals (MDGs) end in 2015.
Author Malcolm Gladwell draws on the science of epidemiology in his book "The Tipping Point" to explain how ideas spread through a population, in the same way as an infectious disease can proceed from a few cases to a full-blown pandemic.
Providing school meals for 45 million children is a remarkable achievement for Brazil. But the programme faces specific difficulties, as well as the generic problems plaguing any national plan in this vast country of more than 192 million people.
"I heard about the Zero Hunger plan on television, but unfortunately it has not arrived here," complained Elías Ruíz, a small farmer in the southern community of Santa Odilia, about the Guatemalan government's flagship programme to end poverty.
The Brazilian government is stepping up South-South aid, to strengthen the South American giant’s status as a donor country and its international clout. It now provides assistance to 65 countries, and its financial aid has grown threefold in the last seven years.
The man who played a key role in the design of Brazil's successful food security policies believes it is possible to eradicate hunger in the world, and intends to try by promoting "a simple idea."