Religion is something left over from the infancy of our intelligence, it will fade away as we adopt reason and science as our guidelines. —Bertrand Russell
Many books and websites attribute this quote to Bertrand Russell, but none I saw has given any source. One exception is this link book from Google Books. It mentions, "Russell, Letter (1958) To Mr Major," 41-42. I did a Google search with that term but nothing useful came out.
Did Russell say or write this?