This thesis has been an attempt to isolate the contribution that was made to the fascist movements of Sir Oswald Mosley by Alexander Raven Thomson. Despite featuring in most studies of Mosley's fascist enterprises, until this study little was known of his life and thus the proper context for his work had been lost. In this attempt to analyse Raven Thomson a chronological structure has been adopted. Special attention has, however, been placed on his developing thought in response to Oswald Spengler's prognosis for the future of Europe, before and after his acceptance of fascism in both its inter-war and post-war incarnations. This has enabled new insights into his Corporate State ideas within fascism and the anti-Semitic campaign within which he was an active participant, both of which had been the source of previous academic interest. Unlike other studies in this field which present the reader with either an examination of Mosley fascism to 1940 or British fascists after the war, this study bridges this artificial gap and thus seeks to illustrate the continuity of fascism in Britain. This longer period of study allows for wartime internment and Raven Thomson's part in the revival of fascism to be fully discussed. The result is a biography that attempts to place the subject within its proper context.