This thesis is a survey of the foreign- policy of Benjamin Disraeli during his ministry 1874-1880, with special emphasis placed upon events in the East. The main intention has been to discover whether or not the policies pursued by Disraeli in the Near Eastern crisis of 1876-1878 and the crisis in Afghanistan during 1878-1880, were part of one consistent policy and, if so, what the basis of that policy was. Emphasis has been placed on Disraeli's own actions and opinions, rather than upon a factual account of the two crises and the complicated international diplomacy involved in them. The great six volume biography of Disraeli, begun by W. F. Monypenny and completed by G. E. Buckle, proved to be the most useful and comprehensive source of primary material available. Extensive use was also made of the Hansard records of Disraeli's speeches in Parliament, T. E. Kebbel's two volumes of selected speeches by Disraeli, and the Marquis of Zetland's collection of Disraeli's letters to Lady's Bradford and Chesterfield, also in two volumes. Numerous secondary works were consulted and of these the very detailed works of Professor R. W. Seton-Watson and B. H. Sumner on the Eastern Question were especially valuable.