The world is filling up with conservation plans. Many hundreds have been completed worldwide. But how many make a difference, in terms of preventing the loss of biodiversity? And what can we learn about these planning exercises to plan with greater conservation impact in the future? Emma McIntosh, undertaking a PhD at Oxford University, is setting out to answer these questions, with colleagues Madeleine McKinnon, Bob Pressey, and Rich Grenyer. This month, Emma published a paper in Environmental Evidence, laying out a comprehensive and repeatable search strategy for literature on systematic conservation planning. The result will be a body of literature that Emma will process, looking for evidence that conservation plans influence five kinds of capital: natural, financial, social, human, and institutional. Emma will then publish the results and make available a searchable, online database of studies that have led to some kind of conservation impact.