A one party system, one party state or single party system is a party system in which one party is officially recognized or dominant. It is no longer fashionable today to have a one-party system but some socialist countries such as China, and Cuba Republic still practise this system.

The Nigerian foreign policy is profoundly affected or influenced by the perceptions, attitudes and value preferences of the various participants in the decision-making process. In other words, a nation’s international behaviour is, to a great extent, determined by the interests of those making and implementing foreign policies.