'In this illuminating collection, Marius Ostrowski brings together several essays by Eduard Bernstein, spanning a forty-year period of activity and addressing the question of “what is socialism”. At a time of renewed reflection on the foundation and value of social democracy, engaging with the thought of one of its founding fathers will be immeasurably valuable for both supporters and critics.' —Professor Lea Ypi, London School of Economics, UK 'During his long life, Eduard Bernstein made a contribution of great significance to both the theoretical and political development of the left, emerging as a founding figure of European social democracy. In this splendid volume, Marius Ostrowski presents Bernstein’s writing in its full richness and complexity, bringing together his lucid translations into English of some of the major theoretical works published by Bernstein during the years of the Weimar Republic. This book makes a valuable contribution to our understanding of the development of the socialist tradition during a period of great political turmoil, and gives us a three-dimensional understanding of Bernstein’s contributions to socialism and social democracy.' — Dr Martin O’Neill, University of York, UK