Wright understood that he was defending the very essence of the scientific method and the interpretation of data. I would give the same advice today to big-data, model-free enthusiasts. Of course, it is okay to tease out all the information that the data can provide, but let’s ask how far this will get us. It will never get us beyond the first rung of the Ladder of Causation, and it will never answer even as simple a question as “What is the relative importance of various causes?”

