Through TED we recently found a great presentation of Hans Rosling of Gapminder about changes in the world over last 200 years. This great moving visual graphic explains how countries have been evolving considering population growth, income and life expectancy. At the Gapminder website you can select a lot of other indicators in the fields of economy, environment and geography. The whole explains how the world has become flat in some ways, but became more diverse and unequal in others. Most curious, as stressed by Rosling, is the impact that income has to health in the developing process of a country.