Why are cardiovascular diseases the leading cause of death in men and women in the united states?

If you take your average person, and look at their diet, it doesn't look so good. Eventually over time, if you continue a poor diet.. fat builds up in your arteries. Once these "fat" layers clog up in your arteries, you are prone to a stroke. If you are lucky, doctors can remove this. If we ate better as a society, this problem would be reduced to nothing.