Today we listened/saw a video about the transformation in the society underwent in the last two-hundred years. The video showed us qualities and quantities data on growth of life expectancy and of wealth from the Industrial Revolution to 2009. A person in the video taught us how to read the graphic the video is focused on. The Cartesian graphic have a lifespan data on y-axis and income data on x-axis (obviously the Cartesian graphic has only positive data). In 1810 the life expectancy was 40 years for all nations,  the UK and Netherlands had the highest values but not too much.   The graphic showed in a clear way the despite between rich and poor states. The former colonies developed later than the western countries; despite disparities they was able to improve their life style and they became emergent economics.

After the two World Wars (1915-1918 and 1939-1945) , the Spanish epidemic (1918-1920) and the Great Depression (1929) the most of the countries were able to be in the front the same life expectancy and income.