Volume I of Edward Sapira (TM)s Collected Works contains the reedition of Sapira (TM)s papers and reviews in general linguistics, in the philosophy of language and linguistics (the origin of language; general semantics; the construction of an international auxiliary language), as well as his articles on a ~languagea (TM) and a ~dialecta (TM) written for the Encyclopedia of Social Sciences. The texts have been reedited and supplied with an introductory study and notes. The introductory studies assess Sapira (TM)s contribution to the linguistic study of the various topics dealt with. Volume I also contains a reprint of retrospective appraisals of Sapira (TM)s work in general linguistics written by Zellig Harris and Stanley Newman.