Soil health—useful terminology for communication or meaningless concept? Or both?

What is soil health? It is not essential to have a degree in soil science in order to have a valid opinion on this. In a very general sense, almost everybody has some impression of what is meant by a healthy soil, especially anyone who has done any gardening or even looked after a potted plant on a windowsill. They will probably say it should have a beautiful crumbly structure, should hold water but not become waterlogged, and be teeming with life