Cept from an evolution standpoint, we don't need to live for more than about ~40 years. By that time the next generation has reached adulthood and is ready to take over.
All our genes are interested in is reproducing. That's it.
You ignored my entire post. Congratulations.
As I said, gene survival in social animals (like humans) is largely achieved by contributing to a functioning society.
Genes that help you live and stay healthy longer help you work longer, learn longer, gain more experience in life and whatever you do/study, and act as an elder for younger generations. This is good for society and those who live within it, and therefore is good for the genes. If this were not true,
complex social behavior wouldn't have evolved in the first place.
In other words, yes, genes survive primarily by reproduction, but they need THOSE offspring to thrive and compete as well, and a better-working social structure is good for that. This is evidenced by the fact that we even have one! Complex social behavior evolves in animals because it affords protection to the individuals and therefore to the continued survival of the group, and thereby those genes as well.
Sorry if I'm repeating myself, but since you don't seem to be reading what I say, I feel the need.