I argue your assertion that every unity is artificial. For example, consider the unity between electricity and magnetism. When these were first observed in ancient times, it was not at all obvious that they were linked in any way. Scientists eventually discovered that electric and magnetic phenomena could affect one another. In fact, there were some situations where whether the effects observed were magnetic or electric in nature seemed to depend on your viewpoint. From this scientists eventually concluded that electromagnetism is one unified set of phenomena, and the apparent division of electricity and magnetism comes from the necessity of having a particular perspective to observe the phenomena. If a new scientific theory came along that re-separated electricity and magnetism, it would still have to explain the mixing of their associated phenomena and explain how things like hard disk drives work, where this mixing is an essential part of their function.
A Random Comment from June 18, 2011
I argue your assertion that every unity is artificial. For example, consider the unity between electricity and magnetism. When these were first observed in ancient times, it was not at all obvious that they were linked in any way. Scientists eventually discovered that electric and magnetic phenomena could affect one another. In fact, there were some situations where whether the effects observed were magnetic or electric in nature seemed to depend on your viewpoint. From this scientists eventually concluded that electromagnetism is one unified set of phenomena, and the apparent division of electricity and magnetism comes from the necessity of having a particular perspective to observe the phenomena. If a new scientific theory came along that re-separated electricity and magnetism, it would still have to explain the mixing of their associated phenomena and explain how things like hard disk drives work, where this mixing is an essential part of their function.