This volume of Bertrand Russell's Collected Papers finds Russell focused on writing Principia Mathematica during 1905–08. Eight previously unpublished papers shed light on his different versions of a substitutional theory of logic, with its elimination of classes and relations, during 1905-06. A recurring issue for him was whether a type hierarchy had to be part of a substitutional theory. In mid-1907 he began writing up the final version of Principia, now using a ramified theory of types, and eleven unpublished drafts from 1907-08 deal with this. Numerous letters show his thoughts on the process. The volume's 80-page introduction covers the evolution of his logic from 1896 until 1909, when volume I of Principia went to the printer.

This volume of Bertrand Russell's Collected Papers finds Russell focused on writing Principia Mathematica during 1905–08. Eight previously unpublished papers shed light on his different versions of a substitutional theory of logic, with its elimination of classes and relations, during 1905-06. A recurring issue for him was whether a type hierarchy had to be part of a substitutional theory. In mid-1907 he began writing up the final version of Principia, now using a ramified theory of types, and eleven unpublished drafts from 1907-08 deal with this. Numerous letters show his thoughts on the process. The volume's 80-page introduction covers the evolution of his logic from 1896 until 1909, when volume I of Principia went to the printer.

A founder of modern analytic philosophy and one of the most important logicians of the twentieth century, Bertrand Russell has influenced generations of philosophers. The Bloomsbury Companion to Bertrand Russell explores this influence in detail and responds to renewed interest in Russell's philosophical approach, presenting the best guide to research in Russell studies today. Bringing new insights into Russell's relationship with his contemporaries, a team of experts explore his life-long battles with important philosophical issues. They consider how he influenced thinkers and schools of thought, from Schröder, Frege and Meinong to Wittgenstein and the Vienna Circle, while also covering his impact on individual issues in epistemology, logic, metaphysics, philosophy of mind, philosophy of language, and political philosophy. Importantly this companion discusses often overlooked topics. Focusing on Russell's later views, including his moral philosophy and his politics, reveals that Russell did make significant contributions to ethics - both theoretical and practical - in the course of his career. Through a combination of enlightening historical background and sustained focus on Russell's impact on contemporary areas of philosophy, The Bloomsbury Companion to Bertrand Russell demonstrates why Russell continues to influence philosophers of language, mathematics, epistemology and metaphysics.

Mathematical and philosophical thought about continuity has changed considerably over the ages, from Aristotle's insistence that a continuum is a unified whole, to the dominant account today, that a continuum is composed of infinitely many points. This book explores the key ideas and debates concerning continuity over more than 2500 years.