This document defines and discusses the concept of imperialism. It provides several definitions of imperialism from different scholars and outlines the key features and methods of imperialism, including military, economic and cultural imperialism. The document also discusses the motives, theories, merits and demerits of imperialism. It describes the relationship between imperialism and colonialism, distinguishing their differences. The concept of neo-imperialism is introduced and its key features are outlined. The document concludes by stating that while imperialism and colonialism have been reduced, they have not been fully eliminated from international relations.