We need to remember that our bodies are evolutionarily optimized for getting to childbearing years, and then living long enough to get our children to a point where they can be independent. After that there are really no evolutionary pressures keeping us around.
Untangling all that and re-engineering ourselves (biologically) to overcome that is probably a pretty monumental task; starting from scratch with something simpler (and perhaps non-biological) might be easier, with sufficiently advanced technology.
We need to remember that our bodies are evolutionarily optimized for getting to childbearing years, and then living long enough to get our children to a point where they can be independent. After that there are really no evolutionary pressures keeping us around.
Untangling all that and re-engineering ourselves (biologically) to overcome that is probably a pretty monumental task; starting from scratch with something simpler (and perhaps non-biological) might be easier, with sufficiently advanced technology.