1 Animated Visualization of Multiple Intersecting Hierarchies George Robertson, Kim Cameron, Mary Czerwinski, & Daniel Robbins Corresponding Author: George Robertson Microsoft Research One Microsoft Way Redmond, WA 98052, USA Tel: 1-425-703-1527 Fax: 1-425-936-7329 E-mail: ggr@microsoft.com Running Title: Polyarchy Visualization To appear in Journal of Information Visualization, Vol. 1, No. 1, March 2002