Bertrand Russell book Religion and Science
Religion and Science (1935), Ch. X: Conclusion
1930s
Bertrand Arthur William Russell, 3rd Earl Russell, was a British philosopher, logician, mathematician, historian, writer, essayist, social critic, political activist, and Nobel laureate. At various points in his life, Russell considered himself a liberal, a socialist and a pacifist, although he also confessed that his sceptical nature had led him to feel that he had "never been any of these things, in any profound sense." Russell was born in Monmouthshire into one of the most prominent aristocratic families in the United Kingdom.In the early 20th century, Russell led the British "revolt against idealism". He is considered one of the founders of analytic philosophy along with his predecessor Gottlob Frege, colleague G. E. Moore and protégé Ludwig Wittgenstein. He is widely held to be one of the 20th century's premier logicians. With A. N. Whitehead he wrote Principia Mathematica, an attempt to create a logical basis for mathematics, the quintessential work of classical logic. His philosophical essay "On Denoting" has been considered a "paradigm of philosophy". His work has had a considerable influence on mathematics, logic, set theory, linguistics, artificial intelligence, cognitive science, computer science and philosophy, especially the philosophy of language, epistemology and metaphysics.
Russell was a prominent anti-war activist and he championed anti-imperialism. Occasionally, he advocated preventive nuclear war, before the opportunity provided by the atomic monopoly had passed and he decided he would "welcome with enthusiasm" world government. He went to prison for his pacifism during World War I. Later, Russell concluded that war against Adolf Hitler's Nazi Germany was a necessary "lesser of two evils" and criticised Stalinist totalitarianism, attacked the involvement of the United States in the Vietnam War and was an outspoken proponent of nuclear disarmament. In 1950, Russell was awarded the Nobel Prize in Literature "in recognition of his varied and significant writings in which he champions humanitarian ideals and freedom of thought". Wikipedia

Bertrand Russell book Religion and Science
Religion and Science (1935), Ch. X: Conclusion
1930s
Source: 1910s, Mysticism and Logic and Other Essays http://archive.org/stream/mysticism00russuoft/mysticism00russuoft_djvu.txt (1918), Ch. 6: On the Scientific Method in Philosophy
"On Denoting", Mind, Vol. 14, No. 56 (October 1905), pp. 479–493; as reprinted in Logic and Knowledge: Essays, 1901–1950, (1956)
1900s
Bertrand Russell book Religion and Science
Religion and Science (1935), Ch. IX: Science of Ethics.
1930s
Variant: "What science cannot tell us, mankind cannot know." (Attributed to Russell in Ted Peters' Cosmos As Creation: Theology and Science in Consonance [1989], p. 14, with a note that it was "told [to] a BBC audience [earlier this century]").
Interview with Irwin Ross, September 1957;If there were a God, I think it very unlikely that he would have such an uneasy vanity as to be offended by those who doubt his existence. Collected Papers of Bertrand Russell (2005), p. 385
1950s
“I find that the whiter my hair becomes the more ready people are to believe what I say.”
Bertrand Russell Speaks His Mind (1960), p. 80
1960s
Our Sexual Ethics http://www.utilitarian.org/texts/oursexethics.html (1936) <br class="br">1930s
Source: 1930s, Power: A New Social Analysis (1938), Ch. 2: Leaders and Followers
After some fifty or sixty repetitions, this remark ceased to amuse me.
Source: 1950s, Portraits from Memory and Other Essays (1956), p. 9
The New York Herald-Tribune Magazine (6 March 1938)
1930s
Principles of Mathematics (1903), Ch. I: Definition of Pure Mathematics, p. 3
1900s
Letter to Colette, December 28, 1916
1910s
Source: 1920s, Sceptical Essays (1928), Ch. 2: Dreams and Facts
Source: 1930s, Power: A New Social Analysis (1938), Ch. 1: The Impulse to Power
“A world without delight and without affection is a world destitute of value.”
The Scientific Outlook (1931)
1930s
Source: 1950s, My Philosophical Development (1959), p. 200
Source: 1910s, Our Knowledge of the External World (1914), p. 70
“The old often envy the young; when they do, they are apt to treat them cruelly.”
1920s, What I Believe (1925)
Source: 1910s, Proposed Roads To Freedom (1918), Ch. VI: International relations, p. 99
An Outline of Philosophy Ch.15 The Nature of our Knowledge of Physics (1927)
1920s
“War does not determine who is right – only who is left.”
This has often been published as a quotation of Russell, when an author is given (e.g. in Quote Unquote – A HandBook of Quotation, 2005, p. 291), but without any sourced citations, and seems to have circulated as an anonymous proverb as early as 1932.
Disputed
1910s, The Problems of Philosophy (1912)
“Ironclads and Maxim guns must be the ultimate arbiters of metaphysical truth.”
Quoted in The Edinburgh Review: Or Critical Journal, Vol. 209 (1909), p. 387
1900s
1940s, Philosophy for Laymen (1946)
1900s, A Free Man's Worship (1903)
Letter to Rudolf Carnap, June 21, 1962
1960s
“Most people, at a crisis, feel more loyalty to their nation than to their class.”
Source: 1930s, Power: A New Social Analysis (1938), Ch. 8: Economic Power
The Problem of China (1922), Ch. XI: Chinese and Western Civilization Contrasted
1920s
BBC interview on "Face to Face" (1959); The Listener, Vol. 61 (1959), p. 503
1950s
Source: 1910s, Mysticism and Logic and Other Essays http://archive.org/stream/mysticism00russuoft/mysticism00russuoft_djvu.txt (1918), Ch. 5: Mathematics and the Metaphysicians
Foreword to Ernest Gellner Words and Things (1959)
1950s
John D. Barrow, Between Inner and Outer Space: Essays on Science, Art and Philosophy (Oxford University Press, 2000, ISBN 0-192-88041-1, Part 4, ch. 13: Why is the Universe Mathematical? (p. 88). Also found in Barrow's "The Mathematical Universe" http://www.lasalle.edu/~didio/courses/hon462/hon462_assets/mathematical_universe.htm (1989) and The Artful Universe Expanded (Oxford University Press, 2005, ISBN 0-192-80569-X, ch. 5, Player Piano: Hearing by Numbers, p. 250 <br class="br">Misattributed
“Not enough evidence God! Not enough evidence!”
Bertrand Russell book Religion and Science
As quoted in Wesley C. Salmon's "Religion and Science: A New Look at Hume's Dialogues," Philosophical Studies 33 (1978), p. 176. <br class="br">Also in the New York Times article So God's Really in the Details? (May 11, 2002) by Emily Eakin: "Asked what he would say if God appeared to him after his death and demanded to know why he had failed to believe, the British philosopher and staunch evidentialist Bertrand Russell replied that he would say, 'Not enough evidence, God! Not enough evidence.' <br class="br">The original source of this quote is an article by Leo Rosten published in Saturday Review/World (February 23, 1974) which features an interview with Bertrand Russell. There, Rosten writes http://www.unz.org/Pub/SaturdayRev-1974feb23-00025: "Confronted with the Almighty, [Russell] would ask, 'Sir, why did you not give me better evidence?'" <br class="br">Disputed
Letter to Rachel Gleason Brooks, May 5, 1930
1930s
“The time you enjoy wasting is not wasted time.”
From Marthe Troly-Curtin's Phrynette Married (1912). Misattributed to Bertrand Russell due to an ambiguous entry in Laurence J. Peter's Peter’s Quotations: Ideas for Our Time (1977) http://quoteinvestigator.com/2010/06/11/time-you-enjoy/ <br class="br">Misattributed
1930s, Mortals and Others (1931-35)
Letter to Miss Rinder, July 30, 1918
1910s
Leaflet issued while Russell was in Brixton Prison, 1961
1960s
1910s, The Philosophy of Logical Atomism (1918)
1910s, The Philosophy of Logical Atomism (1918)
Source: 1910s, Mysticism and Logic and Other Essays http://archive.org/stream/mysticism00russuoft/mysticism00russuoft_djvu.txt (1918), Ch. 1: Mysticism and Logic
"Sex in Education", p. 119-120
1930s, Education and the Social Order (1932)
Letter to Gilbert Murray, April 3, 1902
1900s
What is an Agnostic? (1953)
1950s
“Power may be defined as the production of intended effects.”
Source: 1930s, Power: A New Social Analysis (1938), Ch. 3: The Forms of Power
1920s, What I Believe (1925)
Source: 1910s, Introduction to Mathematical Philosophy (1919), Ch. 18: Mathematics and Logic