Why is life programmed to survive?

[deleteduser12345]

What you said makes no sense, what Jenny said is something simple that can be concluded based on our current knowledge, it doesn't take a genius. The will to live is an emotion, a desire, ok? That emotion or will we have is caused by our genetics. The organisms that never got this strong will to live because of their genetical makeup never survived.

Then why/how do some people loose it? I must not be hard wired...more like a suggestion.

Perhaps the will to live is like the speed limit; some people go faster, some people go slower, and some people don't take care of their car and it craps out on them in the middle of the journey.

Not completely certain. The human brain isn't perfect, it's subject to fault. It can be the brain structure, diet, worrying, chemical imbalances, and some of em' are genetical, but I've heard from many that it runs through their family, indicating it's genetical. I have a friend, his now ex girlfriend is severely depressed and nothing worked on her, no diet, no medicine, no therapy, nothing. IIRC it is just the way her brain works.

E.g it can be a genetic mutation (happens all the time) that reduces your seratonin production, some are more prone while some are more resiliant. What we know for sure is all your emotions including your will to live as opposed to let's say suicidal thoughts are all chemicals in the brain, if somethings goes wrong, well.