We’d have the same relationship to time as we do now, except for one thing: our time horizon would be much farther. We’d be able to plan for 100, 200, 1000 years ahead, and know we’ll be there to see the results of the plan.
Time wouldn’t pass any faster or slower, in terms of our perception. We’d still have the same interest in time, as we did before. Cultural differences in relationships to time would remain the same. Costa Ricans would still have tiko time, and the Japanese would still be running the Shinkansen exactly on schedule.
Our relationship to time, as a culture, is based on what we want to do. Westerners of European extraction, as well as many East Asian cultures want to be rich, and achieve status via wealth. So they spend as much of their time creating wealth as they can stand. Other cultures value other things, and so can spend much more time meeting and visiting and traveling and so on.
None of this would change as a result of living forever. If we are a workaholic, wealth-obsessed culture, we’ll continue in that vein, only even more so, because we’ll know the power of compound interest will be in our favor.
Culture will change, of course, the further along we get. The oldest will be the wealthiest, and since they don’t die, they won’t leave room for younger people to take over. There may be some sort of mandatory retirement, so older people have to start over again with a new career. Even so, they will always have an advantage over others.
As wealth grows, perhaps the oldest would turn to more artistic or philosophical pursuits, since they no longer need to worry about money. Or, perhaps people would stop having children, or they would have children at a much slower rate. Maybe there would be a permitting system, and someone could only have a child when a person had died as a result of an accident or something.
It’s also interesting to think about class issues. Would poor people finally be able to dig themselves out of poverty, or would they remain poor forever? People who don’t know how to manage money might never build wealth, or would everyone eventually learn how to take advantage of the long time horizon?
How about relationships? How long would they last? Most science fiction writers suggest that they might last sixty—maybe ninety years, but after that, most people would change partners. Or would relationships, since they were no longer about families and children, change? Perhaps marriage would no longer be important? Perhaps building a network of friends would become more important. Who knows?
Thanks for inspiring the speculation @ChazMaz!