We've got killer robots for that now.

>How many murders are committed by people over 30 vs under?

I'd guess the majority of murders have been caused by people over 30 declaring war.

>How many people die in car accidents after 30?

Self-driving cars sounds like a good solution

>There's something to be said for having a world dominated by people who are mature and understand the value of their own lives.

Yes, of course the elderly possess great wisdom, but they are also highly inflexible when it comes to thinking of new solutions to new problems. The imaginative power of the child is something highly undervalued and suppressed in our society.

Well, since US elected national office is pretty much 30 and over, that's the only way wars can be declared.

But there's a reason why there's the movie cliche of the old cautious king being toppled by the young warmonger. On average, young people are a lot more prone to violence. Put them in charge of a nation, and I have no doubt that wars would increase rather than decrease.

Yes, of course the elderly possess great wisdom, but they are also highly inflexible when it comes to thinking of new solutions to new problems.

But a lot of that is because your gray matter doesn't work as well as you become elderly. If that weren't the case, we could have young energetic minds that also are wise dominate in society.

Would a hard wired prejudice include being fundamentally biased against old people?

Within the context of the pie-in-the-sky subject we're discussing, calling for citations seems kind of pointless. We're all just speculating and talking about what-ifs.

I suppose my main concern is that if learned prejudices (against race, religion, ideology, age, economic status, etc.) cannot be eliminated by regenerating brain matter, then a potentially fatal error could arise for society since some prejudices can be virtually insurmountable for many humans. Such an error is often solved naturally when the leaders of the previous age die out.

Just like when a computer system has become corrupted or broken, turning it off and on again can be the most simple and effective solution, so can death and rebirth be an effective solution for when our collective mental processes become corrupted.

Would it? In modern, low reproduction societies the dominant interpretation of the universal "honour thy father and thy mother" focuses on care. Even the slightest resemblance to a chain of command that might be present earlier stops at adulthood. But with people forever overshadowed by their undying ancestors, we might see a massive resurgence of the competing interpretation which sees it as a natural power structure. If that happens, well, welcome to pyramid scheme hell.