Originally Posted by J Diddy
How is dying in his best interest?
Psychological egoism is false.
When I say "best interest" it is in the terms of the own individuals interpretation. Maybe a better word is "utility". Any voluntary action you take, you take that because you decided it would give your life/legacy/ etc the greatest utility. So, in the case of someone jumping in front of a car to save their loved one. They may value their loved ones life more than their own and it was the best option at the time, thus, giving them most satisfaction or utility out of any other option. If premeditated, say someone risked their life to diffuse a bomb they may seek fame even if it is posthumous of their good deeds or they weighed the risk vs. reward thinking that if they were successful at diffusing the bomb it could further their career or give them notoriety in their everyday life of such an accomplishment.
My point is I believe all individuals are selfish in their own way whether they admit it or not. It is in human nature.