[Pontiac]

What about unnatural causes of death, such as cancer and other diseases?

The rest of your point not withstanding, cancer and other diseases are natural causes of death.

Cancer and disease are natural processes unless caused by man. The vast majority of disease is naturally occurring. Even man caused disease would be a natural reaction to a man related stimulus.

[Zon]

You're right. Also, in terms of survival -- often referred as the survival of the fittest -- it is deep rooted (albeit still hidden) that the nature of conscious humans is to know/understand nature in order to control nature for the survival of the conscious being. 

For 2,300 years survival of the fittest has been ill-defined as persons wielding the power of external authority over people. The notion that external authorities hold valid power above and beyond the power of the lone conscious individual acting according to his and her nature is absurd when viewed form an individual-survival perspective and not a collective-group survival perspective. 

From a group-survival perspective individual rights to life property and contract can be "legitimately" violated. That in itself contradicts the nature of the conscious being. For 2,300 years history has documented that the two biggest violators and contradictions to those rights have been political and religious authorities.