The rationale behind the adoption of a federal system of government in Nigeria is to

The adoption of a federal system of government in Nigeria is primarily motivated by the need to promote autonomy of states and promote unity in diversity.

Promote the Autonomy of States:
Nigeria is a country with various ethnic groups and cultures. The federal system allows each state, which may represent a particular ethnic or cultural group, to have some degree of self-governance. This means that states can make decisions best suited to their local circumstances, as they have control over certain areas such as education, healthcare, and infrastructure development. By fostering autonomy, the federal system helps prevent dominance by a single ethnic group and allows for more nuanced governance that can address the specific needs and aspirations of different regions.

Promote Unity in Diversity:
Nigerian society is highly diverse, with over 250 ethnic groups. A federal system accommodates this diversity by ensuring that different groups have representation and participation in governance. This system helps in managing diversity by allowing various ethnic groups to coexist peacefully under a central government while maintaining their unique identities and rights. It encourages cooperation and collaboration amongst the states, which contributes to national unity. By integrating diverse groups into a single political framework, the federal system helps to strengthen national identity and cohesion, thus promoting unity.

Ultimately, the federal system in Nigeria seeks to balance the need for a strong central government while respecting the cultural and ethnic diversity that characterizes its population. This balance helps maintain peace, stability, and development across the nation.