Pathology

Self-preservation is keeping yourself alive, either physically or psychologically. The latter includes mentally or economically healthy.
To be successful as a species, the members of that species must have a desire to survive long enough to pass on their genes to offspring. A species with a death-wish dies out rather quickly. Those species that don't die out have members that have devoted some attention to staying alive long enough to have young. It is from those individuals and therefore species that all living things are descended.
The desire to stay alive is an instinctive one, built into the psyche of the organism. The organism will seek those elements of its environment that will enhance its chances for survival. These include food, water, oxygen, and periods of rest to allow the body to repair any wear and tear on the tissues.
Self-preservation is keeping yourself alive, either physically or psychologically. The latter includes mentally or economically healthy.
To be successful as a species, the members of that species must have a desire to survive long enough to pass on their genes to offspring. A species with a death-wish dies out rather quickly. Those species that don't die out have members that have devoted some attention to staying alive long enough to have young. It is from those individuals and therefore species that all living things are descended.
The desire to stay alive is an instinctive one, built into the psyche of the organism. The organism will seek those elements of its environment that will enhance its chances for survival. These include food, water, oxygen, and periods of rest to allow the body to repair any wear and tear on the tissues.