"They called themselves the Vienna Circle" is an insightful work that illuminates the history and thought processes of the Vienna Circle, a significant group of scholars who profoundly shaped the intellectual life of the 20th century. Under the leadership of Karl Sigmund, it traces the development of a scientific worldview that stood firm against the reactionary currents of the interwar period. The book connects the ideas of prominent thinkers such as Russell and Einstein and demonstrates how the Vienna Circle continued to operate in exile despite the challenges posed by National Socialism. The clear and memorable explanations make complex topics like symbolic logic and its influence on computer science understandable. This book is not only a tribute to a fascinating era but also a reflection on the enduring relevance of the questions discussed at that time.