Since the social institutions aren't a well-unified subject, the history of the subject has to be reconstructed from individual areas. The origins in prehistory, developments in antiquity, and in classical and medieval times can be difficult to follow. What is clear is that in modern times, they have become more complex and more formalized than they were before. Comparative studies, using the institutions of different societies, examples from particular cities, and the tools of social structure and change will clarify these areas. I've discussed the major divisions of religion, government, economics, education, and families before. This time, the connections to particular areas of culture will be more useful.
I want to elevate the importance of religion. I have only the sketchiest outline of religious history, and a somewhat better idea of how it is distributed among peoples. The major divisions of particular religion, religious organization, practice, and beliefs are all being studied. This and has been fairl closely connected to government. It is hardly possible to discuss religion in general without looking at particular traditions, and their organization, practice, and beliefs. The economics of religion is not often discussed. Education and the roles of families are also important, and roots in culture will also need to be considered.
The first catetory of particular traditions is what I call Abrahamic religion, and including this will give substance to several other areas of study. Discussion of religious organization, practice, and beliefs will have to be postponed.
Government can benefit from historical and comparative studies, though I don't yet have details. It depends more on religion than is often realized, but discussion of particular governments, government structure, activity, and law will have to be examined later. It is closely tied to economics, somewhat to education, and some to families.
Economics can also benefit from historical and comparative studies. It is somewhat connected to religion, but more importantly to government. I haven't yet reached analysis of particular companies, but economic systems are beginning.
Education likewise can benefit from historical and comparative studies, and is also connected to religion, government, and economics. I haven't yet reached analysis of particular schools or school organization, but this will be coming.
Families likewise can benefit from historical and comparative studies, and are influenced by religion, government, economics, and education. I have a category for particular families, but this doesn't have much content yet.