The chapter stresses the need for better evaluation in peacebuilding, especially in fragile, conflict-affected areas. Strong evidence supports more effective programs and helps secure funding over military solutions. However, there is no clear agreement on what counts as valid evidence in peacebuilding. The authors argue that strict scientific methods may not suit the complex, changing nature of peace efforts. Instead, they call for more flexible, locally grounded approaches to evaluation that reflect real-world conditions and redefine what counts as rigorous evidence in this field.