Livestock keeping remains the most important livelihood for 40 million people in the Horn of Africa and Sahel regions, contributing 5-15% of total GDP and up to 60% of agricultural GDP. However, policymaking around the livestock sector lacks reliable data on its economic contributions. Official figures often underestimate the sector due to the complexity of quantifying direct and indirect livestock production and functions. The document discusses several cases studies highlighting the roles of livestock in reducing poverty and increasing resilience in countries like Senegal and Egypt. It argues more research is needed to better measure and account for livestock's environmental and economic values across various markets and supply chains to support improved policies and partnerships around livestock development.