Complex sentence: While communities were relatively small and homogeneous, CRS could work well, but as populations increased and merchants began to trade across ever wider territories, the system failed to match the emerging societies' needs for more personal accountability and responsibility.
Split into simpler sentences: While communities were relatively small and homogeneous, CRS could work well. But as populations increased and merchants began to trade across ever wider territories, the system failed to match the emerging societies' needs for more personal accountability and responsibility.