Russell's prose has been compared by T.S. Eliot to that of David Hume's. I would rank it higher, for it had more color, juice, and humor. But to be lucid, exciting and profound in the main body of one's work is a combination of virtues given to few philosophers. Bertrand Russell has achieved immortality by his philosophical writings.
Out of step: an unquiet life in the 20th century (ed. Harpercollins, 1987)