Why did unitary system fail in Nepal?

The unitary system in Nepal failed primarily due to the lack of representation and local autonomy, which marginalized various ethnic and regional groups. Centralized governance led to widespread dissatisfaction and demands for federalism, as diverse communities sought greater control over their own affairs. Additionally, the inability of the central government to address the socioeconomic disparities and development needs across different regions fueled discontent, ultimately leading to a push for a federal system that could better accommodate the country's diversity.