The main aim of this thesis is to compile a cohesive and profound account of the main antagonists in Tolkien?s Middle-earth. The main focus lies on Sauron, the Ringwraiths and the Orcs as the prime examples of evil in this imaginary world. These characters are examined according to the given literature, primarily focusing on "The Lord of the Rings". The analysis is centred on a characterization of their respective natures, biographical accounts and the etymological aspects in their construction as well as the significance of their physical appearance. In order to provide a differentiated analysis of the nature of evil in Tolkien, the thesis presents the different epistemai applicable to Tolkien?s work. It further investigates the similarities between Tolkien?s creation myth and the creation in the Christian tradition, exemplified by Milton?s epic poem "Paradise Lost". Sauron?s role as the main antagonist of "The Lord of the Rings" is manifested by investigating his origins and the differing physical states he assumes. The Ringwraiths, on the other hand, are identified as agents of psychological warfare in the narrative. It is revealed that their nature is ambiguous, suggesting a state of physical immateriality that has a major influence on their abilities. Finally, the examination of the race of Orcs indicates the problems of their origin as well as the diversity of these creatures. Furthermore, the analysis reveals significant information about their nature as well as an underlying cultural awareness of this race. Moreover, it was found that they share a degraded form of moral behaviour, and additionally a sense of companionship and humour. In conclusion, this thesis demonstrates that there is more depth to the evil characters in Tolkien?s works than would first be anticipated. Moreover, the results of the analyses reveal numerous details that are essential in order to create a heightened awareness concerning the respective characters.