  Using Chandra archival data, we quantify the evolution of cluster morphology
with redshift. To quantify cluster morphology, we use the power ratio method
developed by Buote and Tsai (1995). Power ratios are constructed from moments
of the two-dimensional gravitational potential and are, therefore, related to a
cluster's dynamical state. Our sample will include 40 clusters from the Chandra
archive with redshifts between 0.11 and 0.89. These clusters were selected from
two fairly complete flux-limited X-ray surveys (the ROSAT Bright Cluster Sample
and the Einstein Medium Sensitivity Survey), and additional high-redshift
clusters were selected from recent ROSAT flux-limited surveys. Here we present
preliminary results from the first 28 clusters in this sample. Of these, 16
have redshifts below 0.5, and 12 have redshifts above 0.5.
