Here we have a great example of positive change, Africa and South America have become a hub in the global life expectancy increasing. Despite the fact that the most developed parts of the world haven't changed a lot (North America and Europe) it might be because they already had a high life expectancy. Unfortunately it has decreased in Lesotho due to HIV. This situation might start changing in a negative way because of the worldwide economic crisis less money will be invested in health and education which actually are human pillars