This article examines The Role of Traditional Justice in Post-Conflict Accountability: Gacaca, Mato Oput, and Community Healing with a focused emphasis on Sierra Leone within the field of Environmental Science. It is structured as a methodology article that organises the problem, the strongest verified scholarship, and the main analytical implications in a concise publication-ready format. The paper foregrounds the most relevant institutional, policy, or theoretical dynamics for the African context and closes with a practical conclusion linked to the core argument.