There is another, fairly obvious, effect of having such an enourmous moon. (The Earth-Moon system is sometimes, incorrectly, being described as a double planet system, as our moon is so big.)
It provides light. Granted, not by itself, but still it lights the dark side of the earth often enough for nocturnal animals to evolve. Without it all animals except bats and stuff would spend the dark (and stormy) nights sleeping. With it you can evolve a reflective surface in your eye and hunt. That can in time lead to a more complex ecosystem and more complex forms of life. Like us, for example.

They is no God but the Invisible Pink Unicorn, and Bill Hicks is her prophet.

Ah, the sweet, sweet memories. I score 62.

I heard it in a techno track- "Go back to sleep america. Here's american gladiators. Shut up! Your government is in control"

Oh my God, They killed Farfur! You Bastards!