There are a few major pro-copyright speculations. One is that “ownership” of works of art in terms of intangible aspect (like text besides paper it is printed on) is natural for capitalism. “Right” and “Left” perceive this alike. But this is a superficial perception. Every single work, say, a book creates its own separate market. That is, copyright creates a total monopoly on that market. And total monopoly, essentially is communism. And vice versa. If there is no copyright at all, all books become available for all publishers which situation translates into classical market place … with fierce competition, of course.