Max Weber noted that bureaucracies aim to maximize efficiency through hierarchies with tasks flowing downward and accountability upward. Bureaucracies also divide labor into specific tasks, use written rules and communications, and view individuals as impersonally replaceable. Over time, bureaucracies may replace their original goals with new ones like the March of Dimes shifting to focus on other causes after developing a vaccine for polio. Weber predicted bureaucracies would come to dominate social life due to their powerful organizational structure.