Here’s an example of visually presenting complex data:
It is really difficult to grasp 400,000 American battle deaths in WWII, or a million deaths at Stalingrad, or many millions of Chinese slaughtered by the Japanese, or the death from the 2 nukes or daily firebombing of Japan.
The Fallen of World War II does a superb job of putting the tragic cost into visual form. The video is 15 minutes and presents a huge amount of info.
If you are interested in history, especially military history, you will get a lot out of the presentation.
If you want to see a brilliant visualization and draw some ideas on how to present complex information, you will want to check it out.
You can see it on vimeo here.