The Future of Food and Farming: Challenges and choices for global sustainability, launched this week by the British government and written by its Foresight think tank, in consultation with researchers from 34 countries from across the developed and developing worlds.
The report provides a uniquely broad view of what causes food scarcity, identifying the factors that make up a complex political, social, economic and scientific web.
And it includes less obvious causes of hunger, such as the distressing fact that nearly a third of the food that is grown is wasted, for example by spoiling through poor storage.
It also conveys the sheer scale of the problem, demonstrating that food scarcity will eventually affect us all, even those of us whose bellies are full. Because, as we have seen in Tunisia and elsewhere, hunger leads to civil unrest and migration, and because farming, as it is currently practised, is destroying key resources and emits too much greenhouse gas.