 A large portion of the episode was based on the ancient astronaut theory , which proposes that intelligent extraterrestrial beings have visited Earth in antiquity or prehistory and made contact with humans . Frank Spotnitz later remarked that he was astounded at how little negative fan mail the show received , despite the fact that the " Biogenesis " / " The Sixth Extinction " / " Amor Fati " story arc heavily hinted that aliens were the originators of the notion of God and religion . He credited the manner in which the show handled this delicate subject , saying , " Often in the past , we 've done stuff where I was sure we would get angry letters . But we rarely do . And the reason is because of the way we handle things . In ' Amor Fati ' we treated the religious side with respect . " The ancient astronaut themes were later revisited in the two season nine episodes " Provenance " and " Providence . " 
 A large portion of the episode was based on the ancient astronaut theory , which <a href='uninflect' title='1'><mark>proposes</mark></a> that intelligent extraterrestrial beings <a href='been_done' title='2'><mark>have</mark></a> visited Earth in antiquity or prehistory and made contact with humans . Frank Spotnitz later remarked that he was astounded at how little negative fan mail the show received , despite the fact that the " Biogenesis " / " The Sixth Extinction " / " Amor Fati " story arc heavily hinted that aliens <a href='uninflect' title='3'><mark>were</mark></a> the originators of the notion of God and religion . He credited the manner in which the show handled this delicate subject , saying , " Often in the past , we 've done stuff where I was sure we would get angry letters . But we rarely do . And the reason is because of the way we handle things . In ' Amor Fati ' we treated the religious side with respect . " The ancient astronaut themes <a href='uninflect' title='4'><mark>were</mark></a> later revisited in the two season nine episodes " Provenance " and " Providence . " 
A bigass portion of da episode was based on the ancient astronaut theory , which propose dat intelligent extraterrestrial beings done visited Earth in antiquity or prehistory and made contact w/ humans . Frank Spotnitz later remarked that he was astounded at how little negative fan mail tdashow received , despite thdaact tdatthedaBiogenesis " / " The Sixth Extinction " / " Amor Fati " story arc heavily hinted that aliens was the originators of the notion of God and religion . He credited the manner in which the show handled dis delicate subject , saying , " Often in the past , we 've done stuff where I was sure we would get angry letters . But we rarely do . And the dason is b/c of the way we handle things . In ' Amor Fati ' we treated the religious side with respect . " The ancient astronaut themes was later revisited in the 2 season nine episodes " Provenance " and " Providence . "