Book excerpt: Malawi is a food-insecure country, and although most households have access to arable land, many rural Malawians cannot reliably obtain enough food to meet their dietary needs. Rainfed, low-input subsistence production, particularly of the staple crop maize, has historically been the primary means of assuring household food security. Today, most of Malawi’s 4 million households continue to grow much of their own food. However, with increasing regularity, several hundred thousand households each year are vulnerable to acute food insecurity. Insufficient crop harvests resulting from poor seasonal growing conditions and limited use of inputs, coupled with reliance on shrinking landholdings as the population continues to grow and in the context of weak markets in which to sell crops and buy food, mean that subsistence farming cannot meet the dietary requirements of all Malawians.