Pastoralism refers to the type of farming system which uses extensive grazing on grasslands for livestock production. This type of farming covers 25 per cent of the world's land area and supports 20 million households. It makes substantial contributions to the economies of developing countries, although agricultural encroachment, conflict and drought continue to erode this way of life. This publication considers key policy issues and trends involved in attempts to improve the livelihoods of pastoralist families and communities.