Ralf Gustav Dahrendorf, Baron Dahrendorf, KBE, FBA (May 1, 1929 – June 17, 2009) was a German-British sociologist, philosopher, political scientist and liberal politician. During his political career, he was a Member of the German Parliament, Parliamentary Secretary of State at the Foreign Office of Germany, European Commissioner for External Relations and Trade, European Commissioner for Research, Science and Education and Member of the British House of Lords, after he was created a life peer in 1993. He was since known in the United Kingdom as Lord Dahrendorf.

Dahrendorf was a leading expert on class divisions in modern society, and has been described as "one of the most influential thinkers of his generation". He served as director of the London School of Economics and Warden of St Antony's College at the University of Oxford. He also served as a Professor of Sociology at a number of universities in Germany and the United Kingdom, and was most recently a Research Professor at the Berlin Social Science Research Center.

The London School of Economics and Political Science -- the LSE -- is one of the most famous academic institutions in the world. This history provides a lively account of the fist century of a university which, form its beginnings has captured not only the minds of social scientists but also the imagination of a wider public. It is the biography of an institution written by an author who was closely involved as a student and later as Director of the School and who remains deeply attached to it. The book places the School in the context of the drama of the twentieth century and it does so through a mirror, the mirror of the social sciences. Lord Dahrendorf traces the story of the LSE from its `invention' by Beatrice and Sidney Webb, George Bernard Shaw, and Graham Wallas as a breakfast in August 1894, through its foundation in 1895, the travails of its early years, the triumphs of the Beveridge years between the wars, the great expansion of the post-war period, and the changing moods of the succeeding decades, including the `troubles' of 1968. The individuals and the events of the LSE's century of existence have been memorable, yet the School has always been more than the sum of its parts. Its base was London, and its home the world.