What would modern day Judeism be like if based on the Sadduceses instead of the Pharases?
I guess avoiding the First Jewish-Roman War would be a good start to achieve this. An interesting question is where this leaves the Christians; do they develop more as a minority sect of Judaism alongside the Pharisees?The problem with that is that the Sadducees were too deeply connected with the continued existence of the Temple and its central role to Jewish religious life - once it was destroyed, they went down with it. However, it wouldn't be impossible for their remnants to reinvent themselves into something that could survive without the Temple, but if that did happen they'd probably become something similar to Karaite Judaism, which much like them, also considers the written Torah as the only source of religious authority.
The problem with that is that the Sadducees were too deeply connected with the continued existence of the Temple and its central role to Jewish religious life - once it was destroyed, they went down with it. However, it wouldn't be impossible for their remnants to reinvent themselves into something that could survive without the Temple, but if that did happen they'd probably become something similar to Karaite Judaism, which much like them, also considers the written Torah as the only source of religious authority.