 Among Russell’s many popularizations are his two best-selling works, The Problems of Philosophy (1912) and A History of Western Philosophy (1945). Both of these books, as well as his numerous books popularizing science, have done much to educate and inform generations of general readers. His History is still widely read and did much to initiate twentieth-century research on a wide range of historical figures from the  presocratics  to  Leibniz.  His Problems is still used as an introductory textbook over a century after it was first published. Both books can be read by the layman with satisfaction. Other popular books, particularly those relating to developments in modern science such as The ABC of Atoms (1923a) and The ABC of Relativity (1925), are now of more historical interest. Even so, they continue to convey something of the intellectual excitement associated with advances in twentieth-century science and philosophy. 