Opening Address of Dr. Kwesi Atta-Krah, Director, CGIAR Research Program on Integrated Systems for the Humid Tropics (Humidtropics) at the International Conference on Integrated Systems Research for Sustainable Intensification in Smallholder Agriculture. The conference is organized by the CGIAR Research Program on Integrated Systems for the Humid Tropics (Humidtropics), in partnership with the CGIAR Research Program on Aquatic Agricultural Systems (AAS) and the CGIAR Research Program on Dryland Systems (Drylands). The conference took place on March 3-6, 2015, at IITA Headquarters in Ibadan, Nigeria.