Unesco's first Philosophical Encounters were held last year at Paris on the theme of “What Do We Not Know?” and they were a great success. Diogenes published some of the papers by participants in its No. 169. A second meeting was held from March 27-30, 1996, devoted to a question as simple and difficult as that of the first: “Who Are We?” Once again this journal will not be able to publish all contributions, but is fortunate enough to present at least some of them to its readers.