This thesis will examine the development of the idea of Enosis amongst the Greeks of Cyprus. Enosis, a term denoting the unification of Cyprus with Greece, was a powerful, emotive political idea in the island for over a century. Whilst the modern history of Cyprus has attracted much scholarly attention, the aim of this study is to use the idea of Enosis as the lens through which to examine the Greek population of Cyprus as a political community. Covering an expansive time period, this thesis will follow a chronological structure, starting with the onset of the British colonial period in Cyprus in 1878 and ending with the island’s eventual partition in 1974. Informed by the methodologies of intellectual history, and building on the existing historiography of nationalist and anticolonial thought, we will trace how Enosis was expressed and disseminated by the Greeks of Cyprus mainly through the island’s newspapers, but also through letters, memoirs, literature, poetry, and parliamentary debates. The purpose of this thesis is to centre Enosis in our analysis by exploring its definitions and variations, its emotional resonance, its contrast with competing political visions, its proponents and opponents, the methods considered employed to achieve it, and most importantly, its initial dominance and eventual decline. This thesis will also engage with the key themes which have emerged through tracing the history of Enosis, particularly around historical continuity, nationalism, anticolonialism, political ideology, and political violence.