[spetznaz]

True. That is one of the greater differences between the developed world and the developing world. Stress levels here are just too high, and more importantly nigh constant. In the developing world they may have their own stress levels, but they are never always at full blast.

Thus i'd agree. Continuous stress must be a major factor. It has been shown that constant stress can mess up the body faster than chain smoking ever could.

I'd have to say diet is another issue. But continuous high stress has to be numero uno.

[Harmless Teddy Bear]

In the developing world they may have their own stress levels, but they are never always at full blast.

Right. Never being quite sure where your next meal is coming from is very soothing.