Russel, Bertrand—Very influential British philosopher of the twentieth century (1872-1970) who was especially interested in mathematical logic and the basic problems of philosophy (appearance and reality, general principles, the value and limits of philosophy, and so on). In a letter of 20 September 1966, Russel suggested to his editor at Oxford University Press that a book of his then in production ought to have a cover illustration of a monkey tumbling over a precipice and exclaiming, 'Oh dear, I wish I hadn't read Einstein.' On no account should the monkey look like me.