>I have a possible hypothesis for CP evolution. Suppose, as some noted
>scientists do, that humankind has reached a high level of civilization many
>times only to be destroyed by nuclear war.
Are you sure these guys don't specialize in mushrooms? Sure a nuclear
war could do a bit of damage, but don't you think that some evidence
would be left, an entombed Pizza Hut or something?
Regards,
Paul.