World war started in
July 28, 1914 – and ended on November 11, 1918
World war 2 started
September 1, 1939 – and ended on September 2, 1945
Last 100 years there have been 2 world wars. Life expectancy in the uk (2012) 81.50 years
• The average chance of a 20-year-old to reach 100 is 23%...