Ok, this might sound silly, but just how well does mankind (us, not Mick Foley) currently understand gravity?
Sure, I know we recognize the effects of gravity and where to find it (and why that is), but do we know what it is?
Early man certainly found uses for fire and knew many of its properties along with requirements needed for its creation (a fuel, access to open air, heat, etc). However, they couldn't have known the smoke was a composition of oxygen, hydrogen and carbon (since they hadn't a clue what that even was) or the chemical reaction involved with the "fire" itself. At their level of understanding, they couldn't possibly have known.
Are we at this same stage in understanding gravity? If so, when we do understand gravity at the same level that we currently understand "fire", would it be so enlightening that it could usher in a new era for mankind?
Just curious.