First published in 1945 and never out of print, this is the second volume of one of the most famous and influential works of the twentieth century.

In this long-awaited volume, Jeremy Shearmur collects the most important writings Popper made in the years after The Open Society was first published. Many are published here for the first time.

Hailed on publication in 1957 as 'probably the only book published this year that will outlive the century', this is a devastating criticism of the idea that there are fixed laws in history and that human beings are able to predict them.

First published in 1945 and never out of print, this is the first volume of one of the most famous and influential works of the twentieth century.

One of Karl Popper's most wide-ranging and popular works, it provides the clearest statement of the fundamental idea that guided his work: that our knowledge grows by an unending process of trial and error.

Karl Popper described Die Beiden Grundrpobleme der Erkenntnistheorie.