Basically, I meant what ufmace said - it would likely cause a lot of social problems, and a lot of advancement of thought comes about due to the old generations

Basically, I meant what ufmace said - it would likely cause a lot of social problems, and a lot of advancement of thought comes about due to the old generations dying off, and new generations coming of age in the new environment. The new group is always better adapted for the new environment of that later era than the old one is (an easy current example of this is the difference between baby boomers and teenagers when it comes to facility with computers) Adaptability is the thing that has enabled humans to thrive to this point, and immortality would cause a serious dent in our adaptability, unless we also gained the ability to easily radically alter our worldviews, unlearning the concepts that cemented themselves in our brains during our adolescence. Immortality could be very bad for the country that invents it, as they quickly relics of the past.