Do we know that it was unusual in the number of religions? Granted, it's the origin of all the major monotheist religions (and there are many beyond the big three). We see these as separate because most of them define themselves as the only true religion. But is that a realistic way to define the number of religions? And is there a survivorship bias here, i.e. do we think of the monotheist religions because European religions such as Druidism are no longer visible, and we tend to ignore less well-known eastern ones like Jain?