"...my objection to copyright of any kind..."
Leo Tolstoy, "Letter to the Free Age Press", 1900
Copyright protection is greed. Much can be said about the usefulness of copyright protection, but nevertheless it is greed. Greed can be basis for some aspects of society. Societies with a focus on greed are often more effective in achieving superiority over other societies, and as a consequence obtaining power over them. However getting the supremacy is also the aim of a society based on greed. So the usefulness of greed is measured by the effectiveness of achieving aims of the very same greed.