As there is no S.A.T.--grade TEST! mandatory before being-allowed-to ascend to US-CIEIO, we gets (as most often more obvious: re a certain former-'Party')
the cuthless, the ethics-free, the barren in reading skills and Imagination (along with the Certainty-mindset) of calibre ~Shrub.

Forced-reading of books wouldn't work at all, at this Late-stage-desire for seppuku in such folk; I vote Sterilization.
(Alas too: 'twas, I think because of JFK's charisma?) that, even later-on:
Obvious Ignorance of ∑ about Vietnam went Zooom, then-again! re Afghanistan, Iraq, Grenada! et al.

We are smug unTeachables. Over & Out.