I think rule of law is probably more fundamental. It's important that the powerful are held to account, and that's very difficult without rule of law.

But if no one enforces the law on the rulling power, the law doesn't work.

If there is no one who makes the laws, the law won't exist ;)

So we have the important three:

- judiciary

- law making by Legislature

- executive powers for enforcing law

It's one of the most important things to keep them separated and not interweaved. The three powers control each other and the fourth one controlling the controlling:

- journalism and it's covered investigations or whistleblowers

And then you need the rule of law that the law is the only law.

This ground pillars of democracy.