"A gripping, yet cautionary history... Ultimately, Exact Thinking in Demented Times... constitutes a salient reminder of the ongoing need for collective rationality in times of ethical and methodological crisis."—Nature
"A brisk and engaging account of the volatile mix of characters that came together to form the Vienna Circle: their fierce intellectual battles over its main doctrines, their foibles and eccentricities, their 'collective eroticism,' and their humiliations (mainly by Wittgenstein) and occasional mental breakdowns... Gives a vivid picture of the 'demented times' in which they attempted to carry out their 'exact thinking,' chronicling how Vienna between the wars... descended from cultural vitality into Nazi barbarism."—New York Review of Books
"A valuable book...the translation (by Mr. Sigmund himself) is almost flawless."—Wall Street Journal
"A passionate and subtly humorous account."—Scientific American
"Sigmund...makes excellent use of the archival material available in Vienna.... He has a particular talent for explaining the ideas--in physics, mathematics, and philosophy--very clearly."—New Criterion
"[Sigmund's] history is decades in the making and well worth the wait for anyone interested in the development of Western philosophy."—MAA Reviews
"Sigmund follows the Vienna Circle...through one of the most turbulent times in the history of central Europe."—Nature Physics
"Encapsulating an effervescent period, Sigmund's work will excite readers interested in the history of modern philosophy and science"—Booklist
"The turn of the 20th century begat a significant rethinking in philosophy... The author, one of the pioneers of evolutionary game theory, traces these ideas through the members of the Vienna Circle, from informal pre-World War I gatherings through the group's formal inception in 1924 to its dissolution following Hitler's annexation of Austria...Many readers will agree that we are currently living in 'demented times,' and Sigmund adeptly lays out a history that has great relevance for today."—Kirkus (starred review)
"Sigmund...breathes new life and energy into this important time period. In this extremely readable and accessible volume, Sigmund's familiarity with the Vienna Circle makes for fascinating observations about the people who made this part of science history possible."—Library Journal
"There is no doubt that the Vienna Circle was an assemblage of some of the most impressive human beings who have ever walked the planet, and Karl Sigmund's book tells its story, and their stories, in a gripping and eloquent fashion."
---Douglas Hofstadter, from the Preface
"Exact Thinking in Demented Times is filled with vivid and fascinating stories of intellectual genius flourishing in the midst of political chaos. Karl Sigmund succeeds in bringing the amazing individuals of the Vienna Circle to life. Highly recommended!"
---Ian Stewart, author of Significant Figures
"Karl Sigmund's rich account of the Vienna Circle teems with insights into the thinking its leading lights, which included some of the most important philosophers and scientists of the 1920s and 30s. A superb book, so replete with inter-disciplinary delights that it will make its readers feel like polymaths."
---Graham Farmelo, Fellow at Churchill College at the University of Cambridge and author of The Strangest Man