Wikipedia points out that Gravity is:
most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass.
As I am not all that clued up on physics, I don't quite understand this and to add to the confusion, in the top voted answer to the closed question, What is Gravity?, the answer starts of by saying that
then later on states that
Einstein's theory treats gravity as something other than force, namely that it isn't a force.
so I have been trying to understand it all with a bit more reading.
In the question, What is Gravity and what causes objects to act against it?, there is a passage with an image which if I understand it correctly, explains the quote from Wikipedia.
So I understand the concept of gravity, in that it's not actually a force, but more of a displacement in the spacetime grid. An object with a big enough mass will bend the spacetime, causing smaller objects to "attract" to it
So the fact that the Earth, the moon and other planets are spinning is not what creates Gravity somehow? Is the bent spacetime why they do not act like a centrifuge and throw everything off the surface?
To add to this, a few years after Einstein’s theory of relativity described gravity as the distortion of space and time, we gained awareness of the confusing world of quantum physics. This led to the discovery of force-carrier particles, or bosons, behind three of the fundamental forces. This is all totally outside my comprehension, and in an attempt to marry gravity with quantum theory, physicists came up with a hypothetical particle — the graviton, and the name is attributed to Dmitrii Blokhintsev and F. M. Gal'perin in 1934.
What I am trying to understand is how is Gravity created?
With all these theories, am I to assume we actually don't know how gravity is created, even though it was discovered in the 17th century and we have had over 400 years to find out?