The author suggests that the tendency of legal systems to treat information as property is creating threats to expression, particularly in the areas of copyright and privacy. Article by Professor Fred H. Cate (Professor of law and Ira C. Batman Faculty Fellow at the Indiana University School of Law β Bloomington) based on his lecture given at the IALS on 15 May 2002. Published in Amicus Curiae - Journal of the Institute of Advanced Legal Studies and its Society for Advanced Legal Studies. The Journal is produced by the Society for Advanced Legal Studies at the Institute of Advanced Legal Studies, University of London