Various explanations have been advanced for the persistent under?performance of agriculture in many African countries, where smallholder farming is still the dominant livelihood activity and the main source of employment, food and income. Some of the oldest arguments remain the most compelling. African farmers face harsh agro?ecologies and erratic weather, characterised by low soil fertility, recurrent droughts and/or floods, and increasingly unpredictable weather patterns associated with climate change. Vulnerability to shocks is compounded by infrastructure deficits (roads and transport networks, telecommunications, potable water and irrigation) that keep poor communities poor and vulnerable, as testified by the phenomenon observed during livelihood crises of steep food price gradients from isolated rural villages to densely settled urban centres. African farmers have also been inadequately protected against the forces of globalisation and adverse international terms of trade ??? for instance, Western farmers and markets are heavily protected in ways that African farmers and markets are not.