For anyone reviewing what has happened and projecting the future, data is essential, but numbers are sometimes confusing, and its easy to misread a trend. So its a real joy to see the work at gapminder.org where data is represented as coloured bubbles.
It's easier to check it out yourself, go play with data, it's great fun and a mind shift about how we view the world. Or check it out at the latest TED TALK by Hans Rosling.
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