Omar W. Nasim is Professor for the History of Science at the Institute of Philosophy at the University of Regensburg, Germany. He is the author of Observing by Hand: Sketching the Nebulae in the Nineteenth Century, winner of the History of Science Society's Pfizer Award for 2016. And more recently, Nasim is the author of The Astronomer's Chair: A Visual and Cultural History (2021).

• Series Editor's Preface Acknowledgements Introduction Stout's Proto-New-Realism British New Realism: The Language of Madness British New Realism: The Language of Common-Sense Russell and the Nature of Sense-Data The Methods of Construction The Methods of Logical Construction Conclusion Endnotes Bibliography Index

Nasim's book is an excellent first in the series History of Analytic Philosophy...' - British Journal for the History of Philosophy '...a fascinating reappraisal of Russell's motivations and influences that significantly advances our understanding of Russell's philosophy...This book is a very original study that genuinely deepens our understanding of Russell by presenting new insight into his motivations and concerns at the time when he was engaged in some of the most important work of his career.' - The Journal of Bertrand Russell Studies