In reckoning the man, I believe it would be fruitful to compare him to a scientist and mathematician of the same age.
Bertrand Russell was born into a wealthy and aristocratic family, with a long history of public office, in the late 19th century. His Grandfather was twice Prime minister, and his father was an Earl. The men and women whom he came into contact with in his early life shaped his future interests: Catholics, Quakers, Lutherans, Puritans, Buddhists, Darwinists, Atheists, Agnostics, Anarchists, Communists, Socialists, Liberals, Imperialists, Nationalists, Suffragettes, Irish Home Rule activists, Contraceptive activists, Free-Love activists, and various types of historians and philosophers; it is in this high minded environment of theories and spiritualities that Bertrand Russell narrates his formative youth. He was very well tutored, and by his adulthood he was fluent in the classical languages and thoroughly proficient in mathematics. After experiencing his first pubescent urges, he became obsessed with many of the Romantic poets, such as Shelley. Looking back, he explains, the sweet joy he would experience on reading such works of beauty were actually an outlet for his repressed sexual urges. He viewed himself and the various processes and peoples of his life through a high-minded theorising of various philosophies and ideas. It is no surprise that he became a philosopher and a mathematician. At least partly from his reading Mill, he was a proponent of women’s suffrage; and later, before the first World War, he became a pacifist, for which he was both politically and physically attacked.
I cannot speak on his philosophy with any sort of authority; however, I can do so with his mathematics. He was generally interested in the foundations of mathematics, and developing an abstract logical framework in which the ordinary mathematics of 1+1=2 may be logically and formally deduced. Again, it is to the abstract theorising that he normally gravitates. This possibly explains his lifelong feelings of loneliness that at various times drove him to thoughts of suicide. Surprisingly, he was not especially well read for his time; but he did have a deep understanding of those ideas he chose to speak of; which, combined with an unpretentious eloquence, produced a noble and progressive philosopher-writer. His History of Western Philosophy is excellent, although sometimes lacking in scope.
While reading of his travels in the US during WWII, during which he was hired as a sort of popular-philosophy lecturer for middle class workmen, it struck me at once that, at this exact time, Richard Feynman, a man born into poverty amidst the Great Depression, was working on the first atomic bomb. Feynman was not a man of philosophical theories or spiritualities. From a very young age, he spent his time tinkering with radios and listening to his father read from a popular encyclopaedia. While his father worked in sales, he would work as a busboy in the local hotel. He was self-taught in mathematics, and in his spare time would read about biology and chemistry instead of history, politics, or philosophy. Through pure ability alone, he was awarded a scholarship from MIT to study physics. Later when taking the graduate entrance exam in Princeton, he received a perfect score in mathematics, but did poorly in the history and English portions.
It is very hard to overstate the influence Richard Feynman had on physics and science as a whole. His receiving of the Nobel Prize was predicated on his formalising of all hitherto knowledge of electromagnetism into one coherent theory: the theory of Quantum Electrodynamics. Quantum Electrodynamics is quite possibly mankind’s greatest achievement. I will gladly argue anybody on this fact. Through it, we have achieved a complete understanding of a fundamental process of our universe, no matter at what point in time and space you are considering. This is just one of Richard Feynman’s contributions to mankind’s knowledge of the universe.
Bertrand Russell was the last of those men before the World Wars who, by sitting in his armchair and debating abstract philosophy, could achieve pre-eminence and influence. Today, we no longer have any time for such things. The men of pre-eminence are the scientists, engineers, entrepreneurs, popular novelists, and the politicians. We have dispensed with the abstract in the public sphere and have elevated the pragmatic and scientific. Richard Feynman, for example, knew barely anything about history or philosophy. He knew nothing at all about the classics, and in fact had only a passing knowledge of one language other than English, namely Portuguese. He was born into a working class background, and vehemently disparaged pretension and all sorts of affected sophistication. Even though both men were mathematicians and scientists, they occupied very different realms (although, they were both friends of Einstein).
These days, any achievement in science, politics, or popular literature, far outweighs all contributions of high-minded philosophers to the average person’s life. Who honestly cares if some Harvard professor has delineated a new argument for Kantian thought, when Bill Gates has supplied the world with cheap computing? Never again will you commonly hear someone debating the merits of a philosophical or spiritual theory on the bus; any public speaker who demands attention in such things are branded as quacks. These days, any sort of sophisticated discussion we have in the public sphere are purely scientific and socio-political. Men and women like Elon Musk, or Angela Merkel are known to everyone; while the pre-eminent abstract philosophers of today are known to virtually no one.
This is Bertrand Russell’s legacy; the last of a dead strain of intellectuals. He was a great man, nonetheless.