Vision of Humanity is one of the most beautiful and thorough visualizations that I have recently seen.
It's a zoomable Flash world map, which lets you browse and compare a vast number of "peace indicators," such as level of violent crime, access to weapons, jailed population, relations with neighboring countries, and more.
You view a world heat map, which shows where that index is most prevalent. You can zoom in on a specific country and browse through all of its indicators, and you can compare two or more countries.
The site takes all of these indicators and derives a single number, which it calls the "peace index." At a glance, you can basically see which countries are the most peaceful and which ones rank worst on the list.Go there...