system
Given the following post, respond as if you're commenting on Reddit:
human
Given the extreme difficulty of unifying Gravity with the other three fundamental forces is it not likely that it's just a completely unrelated phenomenon?

As I understand it gravity is a fairly stable deformation of spacetime (or, possibly the cause of the deformation, I'm unclear on the specifics), while the other three forces have no similar effect. In fact it seems to behave completely differently from the others, and to me this suggests it isn't similar enough to be unified (seems like suggesting that a rope and a phone call are similar because they can, given the right circumstances, be used to move an object closer to me). Why, then, is there such a strong desire within the physics community to unify them? Or (and I consider this far more likely, given my relative ignorance on the subject compared to actual physics researchers) am I completely missing something?
gpt
As is always the case in research, we don't know in advance how things will work out, so certainly the quest for unification is driven by aesthetics. 
 
However, there are scientific similarities that can be found among the forces.  For example, all the forces we know of are founded on what are called *local symmetries*---the equations of motion are left unchanged by transformations that can vary from point to point in space and time.  Furthermore, it is known that if you take gravity in a higher number dimensions and reduce it to the world we know (3 space and 1 time dimensions), the resulting theory looks like gravity as we know it in 3+1 dimensions plus some additional things, and those additional things naturally appear as gauge theories, the same class of theories that our models of the strong, weak, and electromagnetic forces fall into.