It should not be assumed that all five of these will exist at any one time. Their power may wax and wane to the point where one or more become completely ineffectual. It can be taken as read that within this grey box, each element can affect the level of each of the others in both a positive and negative way. The judiciary is essentially an arbiter of law independent of the government, and as such may have little power in many societies. It is hoped that it would have a balancing effect on the powers of the other elements.
Industry represents the private companies that employs many of the society's inhabitants.
It is a recent development in most real world societies, probably barely existing prior to the Industrial Revolution. As a whole these five elements represent the power of a few people over the masses, and the balance of power within the block can and will shift from one element to another. This is not to say these elements always hold great power. They may, for example, only gradually emerge in a simple society, one element at a time. At the other extreme would be a dictatorship or a fundamentalist religious state.