“Who defines winning in life?”
Survival... of the fittest.”
Very true, from the perspective of a living person.
But from the perspective of a soul occupying that physical body, the answer might be different.
“But from the perspective of a soul occupying that physical body, the answer might be different.”
Yes, if you believe in a soul and afterlife then the end of a physical life is not the end. And for the Muslims for example you get rewarded for offing yourself while doing away with heretics.
The fight for survival can take place at several levels. At an individual level when a thug is robbing you at gunpoint, or at a group level such as say between Muslims and jew or Christians, or among species.