For the past several years I have been working on a book that develops a systemic/relational approach to the study of international societies.  Systems, Relations, and the Structures of International Societies is now available.  (A paperback edition should be out in a couple months at a much more reasonable price.)

Cambridge University Press:  https://www.cambridge.org/core/books/systems-relations-and-the-structures-of-international-societies/1B7813588FAD528666AB2C7AE3B795B4#:~:text=Reviews,’

Google Books:  https://books.google.com/books?id=8tfbEAAAQBAJ&newbks=1&newbks_redir=0&printsec=frontcover#v=onepage&q&f=false

Amazon:  https://www.amazon.com/s?k=9781009355186&i=stripbooks&linkCode=qs

If you are a scholar without access to a library that can make the book available to you, please email me directly (jack.donnelly@du.edu) and I can attempt to get you a copy.