“In 1865, Karl Marx confessed that he considered his chief characteristic ‘singleness of purpose,’ and that his favorite occupation was ‘bookworming.’ Five years later, Oscar Wilde wrote in an album called ‘Mental Photographs, an Album for Confessions of Tastes, Habits, and Convictions’ that his distinguishing feature was ‘inordinate self-esteem.'” Over at The New Yorker, take a look at how Marcel Proust’s questionnaires inspired a generation of question-by-by-question introspection.