Do the three theosophical organisations work together?
There are and have been various attempts to get the three major theosophical groups to work together on an organisational level. These usually fail because the implicit assumptions about what theosophy is and how it should be studied are very different between the organisations. On an informal level working together despite differences has always been possible. Cross-fertilisation certainly happens and the doors of communication have never been closed. With the internet and online forums the divide between members of these organisations is smaller than it’s ever been.