NihilZero
WHEOOHRNY
I often get Code of Laws before priesthood though.
The priesthood path, while not the most expensive tech path, does slow down other early techs.
Priesthood can often be picked up as a freebie, though, if you can get somebody to pleased. It's so cheap that all but the tight-fisted AIs (of which there are a few) will just let you have it if you ask them nicely.