Culture drift does not require bad people, it just requires the right conditions. Unchecked positional power, silence from those who don't speak up, a gradual normalisation of small shifts until they become acceptable. Purpose, values and ethics are the fixed point. The thing you look back to and ask honestly: are we still where we said we would be?

There is no certainty available right now — and waiting for it is a choice. So is acting without it. The question isn't whether your board can wait for clarity. It's whether your board is ready to govern without it.