[CrystalGamma]

On the other hand, people not only drive, but also oppose progress; as a smarter than me person (don't remember who it was) said: Science advances one funeral at a time (it's basically like evolution). If people stop dying (barring accidents), we'll basically stop advancing as well.

[erik_seaberg]

Aging eventually impairs the brain. If life extension is possible, it will have to protect pretty much all your organs from aging, and why would the brain be excluded?

[mentat]

Paradigm shifts would become much more rare due to ossification of power structures in intellectual and business arenas.

[alien_at_work]

Again, you're preseenting assumptions. We don't know that things will still work that way if people lived radically longer. You certainly don't know that well enough to shun people who try to find out.