We have many examples whereby societies that become "comfortable" see decreasing birth rates leading to negative population growth. As mortality pressure decreases, the urgency and drive to hurry up and have children decreases.
There's no reason to believe that if we all suddenly could live forever that we wouldn't dramatically slow down how quickly we had children.
Talk to any family about why they're stopping to have children. You'll normally get answers along the lines of, "Well, we're not getting any younger." What if you know that you're not getting any older either?
Personally, if my wife and I hadn't been pushing into our 30's and worried about having a couple of kids before we were too old, we would have waited indefinitely.
Who knows... maybe we might not even have been married? If you have 1,000's of years ahead of you, do you saddle yourself with one person for an eternity?
There's no reason to believe that if we all suddenly could live forever that we wouldn't dramatically slow down how quickly we had children.
Talk to any family about why they're stopping to have children. You'll normally get answers along the lines of, "Well, we're not getting any younger." What if you know that you're not getting any older either?
Personally, if my wife and I hadn't been pushing into our 30's and worried about having a couple of kids before we were too old, we would have waited indefinitely.
Who knows... maybe we might not even have been married? If you have 1,000's of years ahead of you, do you saddle yourself with one person for an eternity?