Not yet. I have some ideas for it, but I'm not planning on working on Laws for a few updates. Probably some time in the summer.
There's no hard historical context for Bronze Age, and it's not designed to have Civilization style technological advancement throughout the game.
My plan for Laws is to let players make choices about their empire to mould it to their own vision. Who should rule, the king or the priests? Is slavery allowed? How should we sacrifice to the gods? Those sort of things will be determined by Laws.