I believe there is only One force, the electro/magnetic force. All other "forces" are effects or manifestations of that One force.
In my An Idea I show how the 3 quarks make up positive and negative fields which account for the strong nuclear force, however, it is limited to ~ 100 protons due to stacking limitations, and then the atom will emit the alpha particle, what appears to be a seperate force called the weak force.
Gravity is an effect of the E/M Force. It is caused by either the bending or warping of the space/time continuum due to the mass which was created by the E/M force, or it may be a twisting of space due to the rotation of the spinning mass.
I believe this is the most logical explanation which unites all known forces into One.
Addtionally, physicists have already concluded that the E/M force, strong nuclear, and weak nuclear were but One force at the beginning of our universe, so I don't think we have to continue to try to reconcile those 3 forces.
Best to all,
Pat