Ragashingo is doing his best to make the backstory of Destiny, as presented in the Grimoire cards, more accessible to the rest of us. A few days ago, he started a series on our forum called 'Bite-sized Backstory' - and it contains easily-digestible chunks of the Destiny universe, with sources (if you want to check up on his facts). Fantastic reading! So far, there are 3 segments:
Give these a read, then check back for updates! (We'll remind you periodically.)