Conservation science needs more high‐quality impact evaluations, especially ones that explore mechanisms of success or failure. Randomized control trials (RCTs) provide particularly robust evidence of the effectiveness of interventions (although they have been criticized as reductionist and unable to provide insights into mechanisms), but there have been few such experiments investigating conservation at the landscape scale. W...

The hypothesis that conservation biology is proceeding along two separate trajectories () has provoked extensive discussion. Caughley's dichotomy, a “small‐population” paradigm versus a “declining‐population” paradigm, has recently been exemplified in discussion of management strategies for conservation of the Javan gibbon ( Hylobates moloch ). Recommendations from extensive fieldwork focused on reducing the major known threat...