I think people's conception of AGI is that it will have a reptillian and mammalian brain stack. That's because all previous forms of intelligence that we were

I think people's conception of AGI is that it will have a reptillian and mammalian brain stack. That's because all previous forms of intelligence that we were aware of have had that. It's not necessary though. The AGI doesn't have to want anything to be intelligent. Those are just artifacts of human, reptilian and mammalian evolution.