. ▁Let o ' s ▁body ▁r ends ▁apart ▁in ▁the ▁water ; ▁the ▁sand tr out ▁which ▁are ▁part ▁of ▁his ▁body ▁enc yst ▁the ▁water ▁and ▁sc ur ry ▁off , ▁while ▁the ▁w orm ▁portion ▁burn s ▁and ▁dis integr ates ▁on ▁the ▁shore . ▁A ▁dying ▁Let o ▁reve als ▁his ▁secret ▁bre eding ▁program ▁among ▁the ▁At re ides ▁to ▁produce ▁a ▁human ▁who ▁is ▁invisible ▁to ▁pres cient ▁vision . ▁S iona ▁is ▁the ▁finished ▁result , ▁and ▁she ▁and ▁her ▁descend ants ▁will ▁retain ▁this ▁ability . ▁He ▁explains ▁that ▁human ity ▁is ▁now ▁free ▁to ▁scatter ▁throughout ▁the ▁universe , ▁never ▁again ▁to ▁face ▁complete ▁destruction . ▁After ▁reve aling ▁the ▁location ▁of ▁his ▁secret ▁sp ice ▁ho ard , ▁Let o ▁dies , ▁leaving ▁Dun can ▁and ▁S iona ▁to ▁face ▁the ▁task ▁of ▁man aging ▁the ▁emp ire . ▁ ▁Con cept ▁and ▁them es ▁ ▁In ▁God ▁Emperor ▁of ▁D une , ▁Frank ▁Herbert ▁analy zes ▁the ▁cy clic al ▁patterns ▁of ▁human ▁society , ▁as ▁well ▁as ▁human ity ' s ▁evolution ary ▁drives . ▁Using ▁his ▁ancest ral ▁mem ories , ▁Let o ▁II ▁has ▁knowledge ▁of ▁the ▁entire ty ▁of ▁human ▁history ▁and ▁is ▁able ▁to ▁recall ▁the ▁effects ▁ ▁and ▁patterns ▁of ▁ty ran n ical ▁institutions , ▁from ▁the ▁Bab yl onian ▁Empire ▁through ▁the ▁Jes uits ▁on ▁ancient ▁Earth , ▁and ▁thus ▁builds ▁an ▁emp ire ▁existing ▁as ▁a ▁complete ▁ne x us ▁en comp ass