I've always wondered why, after the galaxy was reseeded with life, that the elites and prophets were able to develop space faring civilizations long before humanity. Was it because they had easy access to forerunner technology on their home worlds? And if so, why didn't the Librarian give easy access to forerunner technology to humanity on earth when they were reintroduced? She favored humanity, didn't she? So it would seem like something she would be ok in doing.