[T]his work, made of six concise but straightforward chapters, offers an engaging argument about the liberal roots of contemporary left thought. It not only narrates a recent history of socialist ideas, but also attempts to show how ideas and political thinkers may have a concrete impact on policies of their time. [It] brings new perspectives to questions that many left thinkers constantly raise, notably when attempting to understand the ambiguous path that many European so-called left governments have taken in recent years.