What was a major contributor to unrest in nigeria?

 The correct answer is :  its many ethnicities and religions

Explanation: The large numbers of casualties during the civil war in Nigeria were attributed to the many different factions at war with one another. When military leaders and dictators ruled Nigeria they avoided the riots by prohibiting any criticism of the government.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.