This opinion article is poorly written. It's a bunch of assertion with no empirical evidence to back it up. So the market for books and inventions is unravelin

This opinion article is poorly written. It's a bunch of assertion with no empirical evidence to back it up. So the market for books and inventions is unraveling, how? Who are these law professors and experts that says these things? What are their arguments? Ignoring evidence? Put the data into numbers we can understand. Is there any case study of a country with no IP laws? What does history tell us?