Data visualization is an important part of understanding complex systems because it allows for an intuitive understanding of complex systems. Data is not the answer to problems, but pulling a well informed understanding from data can help experts decide the state and needs of the system. The Tweet Bursts project from Senseable City @mit used public tweets to understand events. Data is valuable because it’s inherently crowdsourced. As natural language processing develops, computational understanding of events can be understood and communicated in realtime. Realtime access to events around the world can help leaders (hopefully) make good decisions.
http://senseable.mit.edu/tweetbursts/