Longer Life Span

I have often thought that the world would be a lot better place if we all lived longer, a lot longer.  I think about five hundred years would suffice.  No I don't mean just me I mean everyone, absolutely everyone.  Why? you may ask, would I think this would be good for the world considering the damage that we can do in our short life spans.  Well simply put if we lived that long we  would be around long enough to have to endure any harm we caused to the environment, we would be directly accountable and suffer the consequences of our action or inaction.  Whereas we know that we can only expect around eighty years on this earth so we can bequeath any problems we create to future generations as we peacefully breath our last breath.  And before you react with horror, I know you wouldn't wish to leave your children and grand children to face the problems of global warming that we created would you?  Global warming doesn't really exist does it, and if it does its worst effects will be felt far enough in the future not to effect you.  Yes we all go about with this attitude, I'm just as guilty as you so I aren't absolved from my own criticism.  But that isn't really my point.  And no I'm not one of the save the planet green brigade, we can't save our planet, it is doomed to be destroyed.  All we can preserve is our place on this planet for as long as possible.  And if we don't manage to develop the means to leave the earth humanity as a species is ultimately doomed.  But that debate is for another time for the moment just imagine if you could plant an oak tree you would probably live long enough to see it grow to maturity giving you the option of harvesting it or leave it to live and die in its own time.  Imagine knowing you would live long enough to invest enough money in a pension plan to be able to spend the last fifty years of your life in comfort while not having to work.  Yes I know that if everyone who had been born in the last five hundred years was alive today we would be even more overcrowded, but consider this, if humans were able to bear children up to the age of four hundred and fifty years why would you rush?  Just imagine the enormity of the change a five hundred year life span would bring to the human outlook.  But I'm sure I haven't considered every possibility that would be created by such a long life.  Perhaps others can run with this idea and speculate how our lives would change. Just something for you to think about at the start of the year.
Happy new year to you all.