You are not alone with this. My first tribe still does not have a 90 yr old. I am now close to 5 million tech and 2 million food and have had over 200 deaths. Perhaps the random number generator is stuck?

If so, restarting the game should help; I personally never tried to achieve this - it always occurred after upgraded medicine, usually without me noticing.

There is a way to virtually guarantee an Ancient Elder that is discussed in this thread.

Thank you LadyCFII i will try that and see if that works

I'm having the same problem. I've completed all the puzzles, have all the tech points, 75+ Master Doctors, 100,000+ food and the 3rd generation of villagers have all been dying between the ages of 73-77 due to old age.

I don't want to leave it for days, since that absolutely ruins the game for me, since I like to see what's happening, get Esteemed Elders before people are 30 and set up couples. I won't be able to have lectures for the kids. I hate leaving the game running when I'm not watching it and coming back and finding all my favorites dead. That absolutely ruins the game for me. It truly sucks if that's the only way to do this and I hate it if the programmers have made it that way.

It's not necessary to leave the game off to get an Ancient Elder - that's just one way to do it. As others have said in this thread and elsewhere, it's possible to achieve through constant play, as well.