Do you think this is sad?

I looked at the average expectancy world average, and almost all of Europe, Australia, North and South America (with the only exception of Bolivia and Haiti) are above the world average (66.57). But Russia has found itself under the world average(66.03) which is far behind many developing countries (I.E. Mexico (76.06), Brazil (71.99), China (73.47) which Russia is currently considered. People in countries like Peru (70.74), El Salvador (72.33), and Honduras (69.4) live longer than your average Russian. But what makes this more interesting is at one point in time Russians had a higher life expectancy than the U.S.. What do you think are the main causes (I can name a few but will let you guys answer) that has destroyed their health?