The document summarizes 30 years of work by the DAC Network on Development Evaluation to strengthen learning in development. It discusses how the Network came to be, its members and processes, efforts to generate knowledge through evaluations and joint evaluations, collaboration with partners, advocating for best practices in evaluation, and sharing evaluation results. The Network has influenced development evaluation globally through its five evaluation criteria, development of standards and guidelines, and adapting evaluation to changing needs such as for fragile states and budget support evaluations.