I have explored, in some depth now, a particular archetypal idea: that “there is a hidden meaning behind chaotic life”. The way I have explored it was through Jung’s essay on spirit, which deals explicitly with it. But there is a connection between this idea and synchronicities, which Jung, it seems, didn’t make.
Spirit and its origin myth
In the case of Spirit, Jung does not talk about an individual’s process of integrating archetypal contents as psychological functions: he claims that such a process happened as an overarching development in the history of the human species. That, of course, is a variation on an origin myth: a phantasy, projected backwards into history.
The dead backwaters of life
Patterns of life situations
Synchronicities are something that "appears” in an individual person’s life, usually at some particular stage or around some event. Therefore, we can assume that there are certain patterns in people’s lives when archetypes are triggered, resulting in greater likelyhood of experiencing synchronicities.