The only "true" absolute I see for every person on the planet at all times in the past, present, and future is..... well actually I don't see a single one. Genetic engineering can change so many things, technology *could* solve so many problems, as the universe ages it's possible the laws of physics can change, mature, or be clarified, etc etc. Any ideas or theories or "rules" can change because they are wholly based on the reasonings of thought, and are completely relative to the reasoning and behavior of the thought.
But the things that will most likely never change:
There will always be at least two sides to a story, whether each is told or not
For every negative there is a positive, or else there would be no conceived negatives nor positives
Greed will always be where there is even a slight inequality (and something to be exploited)
Where there is men there will always be a$$holes and where there is women there will always be b!tches
Music, art, entertainment, creativity, comedy, and expression will always be a part of the human culture
^For that reason, while a perfect society could never exist, a (almost perfectly) balanced society is possible, on the whole
Fear and Sex will always be the highest motivators
And there will always be at least one person in the world wondering where Elvis went to
aha- As long as a universe exists the only true absolute is balance, for without balance, neither a universe or a society could exist
[Yoda] Deep, this discussion is [/Yoda]