In 1992, the idea of replanting her father’s ruined coffee farm seemed foolhardy at the time. But in retrospect it was the best business decision that Dorienne Rowan-Campbell, an international development consultant and broadcast journalist, could have made.

For two centuries, all too many discussions about hunger and resource scarcity has been haunted by the ghost of Parson Thomas Malthus. Malthus warned that rising populations would exhaust resources, especially those needed for food production. Exponential population growth would outstrip food output.