The review was commissioned in 2004 by the Science Council as an evaluation and impact assessment of ASB. The review was carried out between late 2004 and mid 2005, by a panel chaired by Dr. William Clark, Harvard University. The panel concluded the following: a) the ASB Programme has played a significant role in transforming the way that decision makers think about the factors shaping land use at forest-agriculture interfaces in the humid tropics. In so doing, it has created the world’s pre-eminent system for use-driven, comparative scientific investigation of human-environment interactions at the forest margin across the pan tropic domain. b) ASB has worked effectively and efficiently in pursuit of its core mission to “raise productivity and income of rural households in the humid tropics without increasing deforestation or undermining essential environmental services, c) ASB has developed a governance and management structure that has been generally effective and efficient in promoting innovative research that successfully integrates capabilities and concerns across CGIAR Centers, tropical regions, scales and disciplines, d) ASB System Wide Programme has been highly relevant to theCGIAR’s core mission and is pursuing work well aligned with the Science Council’s recently articulated System Research Priorities for 2005-2015. The capacity created by ASB can make a unique contribution to achieving CGIAR and SC emerging goals on integrated land, water and forest management at landscape level. That capacity should be sustained and strengthened. The Report is accompanied by two attachments. The first contains the Science Council commentary, which summarizes the Science Council’s views on the Panel Report and on the joint response of the ASB program coordinator, ASB global steering group, and the World Agroforestry Center. The second is the joint response from the ASB program. This report was discussed at the Business Meeting at AGM2005