skipped an archetype like time before last?

[TheNomad]

Hero archetype was skipped after the Civil War (or during? how is that said).  The next cycle was normal.  This one may be repeating the CW turning.  Many, MANY Americans were slaughtered in the Civil War and other factors as to why Hero was not manifested.  Could it be Vietnam decimated a whole generation of would-have-been heroes?  Rather, would they (had they lived) been the parents OF the Heroes had they returned home?  The facet of that generation which survived were not the most honorable people and as is known, were Boomers that were only in it for themselves. 

I am suggesting the possibility of a really long X generation that bled right into a pseudo Artist.  In fact, looking at the previous model without a Hero, it's possible the authors did not know what to make of it so they adjusted the brackets to omit the Hero simply because nothing in the past (or after) made sense in that context.  Meaning, they may have overlooked a "special-rule" archetype that fits between Nomad and Artist that is just marginally manifesting Hero.  Because, we have yet to experience any baby boom in America, even though the time is getting really short for that to happen if is going to happen.  Artists (according to the current model) are approaching full adulthood themselves.  Millennialls are not in a position to produce such a baby boom without their bracket being moved entirely.  The oldest of them being approx 40 and the youngest about 18.

Any answers welcome.  Please provide context.