Current anomaly: Five generations alive!

[Tim Randal Walker]

I think the theory still holds if the coming of age generation (Millenials) and post-elders (G.I.s) over lap only briefly. Basically, the younger generation is just barely starting to have influence, while the influence of the older generation is a last gasp. Of course, the G.I. remnant is now too old to have any significant influence on society.