Defining Violence: A Plausibility Probe Using Agent-Based Modeling (Corrected Version) Ian S. Lustick University of Pennsylvania Prepared for Presentation for “Mapping the Complexity of Civil Wars,” Swiss Federal Institute of Technology Center for Comparative and International Studies Conference in Zurich, September 15-17, 2005. Many thanks to colleagues at the Solomon Asch Center for Study of Ethnopolitical Conflict at the University of Pennsylvania for their critical comments and suggestions, especially to Britt Cartrite, Alex DeRenzy Channer, Roy J. Eidelson, Dan Miodownik, Kaija Schilde, and Stefan Stohler. Thanks also to Dan Miodownik for technical assistance. Templates used in experiments reported here are available for replication purposes. Please contact the author at ilustick@sas.upenn.edu . PS-I executable files and operation manuals are freely available. Visit http://www.psych.upenn.edu/sacsec/abir/ .