This document provides an overview of a study examining challenges to coherence between humanitarian and development aid in protracted crises and conflict-affected contexts. It finds that while principles do not preclude flexible collaboration, in practice interpretations have led to divergent "state-avoiding" versus "state-centric" approaches. It also finds limited shared analysis and leadership to promote collaboration despite commitments. Opportunities exist to develop shared plans, empower collaborative leadership, conduct joint analysis, and ensure appropriate long-term and flexible financing to better address needs in these complex environments.