There are many causes of human death. The most common ones are death by disease, by suffocation/asphyxiation (which is a prolonged lack of oxygen to one’s brain), physical trauma either by accident or through intentional circumstance such as in a homicide, suicide, and the natural process of aging.
Disease, especially infectious disease is a leading cause of death in developing countries. Heart disease, cancer, and diseases caused by obesity are other leading diseases that cause death.
As technology has advanced, death has become more of a condition to be managed than an occurance to be recorded as in days past.