Very good post! I fully believe that biological immortality in humans is achievable in theory one day. Once this kind of immortality is obtained the only feasible method of death would be by accident (assuming that future humanity is also immune to diseases). As such, what I would be interested in seeing is what the cumulative probability of death by accident would be once a person reaches a certain age?

I presume it would be very low for the first couple of centuries or so, but would then dramatically increase over time thereafter...