From this thread, we have the following comment:
To further blur the line, it is possible to give geometrical interpretations of electromagnetism and the nuclear forces, such that they appear to be very similar to general relativity in their structure (using differential geometry). As such the distinction you are making between force and geometry is far from being so sharp.
Could anyone please provide a reference for where I can read more about this? References that are relatively more accessible would be appreciated.