These are some interesting thoughts Michael. I guess the dilemma is that we can never really know what impact on the future we will have, and whether we will be remembered. I guess Marcus Aurelius and the stoic philosophers never thought their ideas would prosper 2,000 years after their deaths!
If we do move on into another realm after death, that opens a whole bunch of questions. One of which would be, are we aware of what transpires here on Earth, or are we blissfully unaware of it all?
The questions could go on and on! Although, they are certainly worth pondering for a while.