Where we last left off in the good book, God had made a nice garden for his new pet people (among other things) and then some drama happened. It's kind of how any situation with new pets goes, right? You lay down the guidelines, but they don't necessarily understand everything you're telling them. They're fresh from the pound and everything is all new and who knows if they can even understand you?
I think it's also like any new roommates situation. There's a brief honeymoon phase until someone gets into someone else's cookie jar, doesn't replace the cookies, and then shit hits the fan. God kicked everyone out because they had stolen his cookies, metaphorically. Or maybe it would be figuratively.