Decadence: Henry Sidgwick Memorial Lecture (1908) is a book written by Arthur James Balfour, a British philosopher, statesman, and Conservative Party politician. The book is a transcript of a lecture Balfour delivered in honor of his friend and colleague, Henry Sidgwick, who was a prominent philosopher and moralist of the Victorian era. In the lecture, Balfour explores the concept of decadence, which he defines as a decline in the moral and cultural...