> There is a very substantial difference: Copyright infringement does not deprive the creator of the original work, unlike theft which does.

Copyright infringement is more like trespass than theft, but trespass is a property concept as well. You've mis-characterized property law here. A property right isn't just about possession, it's the right to exclude. It doesn't just keep you from dispossessing me of my land, but allows me to arbitrarily exclude you from it, even in situations where your use of my property doesn't cause me any loss or deprivation.

> While copyright came into being as an Act of Parliament with the Statute of Anne in 1710

Before the Statute of Anne, operating a printing press require a royal license, so large-scale copying wasn't possible. In other words, copying has been restricted almost since the technology has existed to allow it.

> while property law has systematically been justified with the idea of a natural right to control that which you can physically possess and protect.

Yet we consider it a crime to engage in activities like embezzlement, which specifically involve money or property you do not physically possess. This is quite an unnatural concept if you think about it: you give someone else possession and control of property, then expect the government to intervene if they use it in a way different than you intended? That has no natural analogue and is indeed relatively novel in the history of criminal law.

> I don't see why you believe that either Apple, Google or similar companies have much to win by lobbying for weaker copyright protections. Nor have I seen any kind of evidence that they do.

Google, and Apple, as content distributors, have a great incentive for copyright to be weak, which gives them more leverage in negotiating with content companies. Google and Apple would love not to have to pay for the content that appears in the iTunes or Play stores.

> Copyright is not a property right, no matter how many times they repeat the term "intellectual property". Copyright law exists in the first place exactly because property law fundamentally is based on the concept of possession. Copying does not remove possession of anything, and so it could not be a violation of property rights.

Property does not require possession of anything, nor can they only be violated by dispossessing someone of something. Someone walking onto my property without permission does not dispossess me of it, but is a violation of my property right. Abstract concepts like transferable contractual obligations are also property rights.

> Not even the US has property rights that are anywhere near absolute.

I mean "absolute" in the sense that property law rejects the idea of sharing. Say I have a big plot of land that I don't live on or use for anything. Some people come along and camp in it. The value they gain from camping is greater than the loss to me of the use of land I never use anyway. Property law does not consider that. It gives me the right to exclude people from the property. The government is of course empowered to regulate my usage of my property, but other individuals can't raise "the public good" as a defense to infringement of my property rights. They can't say "this benefits the public a lot more than it hurts the owner."

> weighed against and limited by the concerns for the freedoms and rights of others.

If you think about it, the fact that you can't cut across someone's land is a much bigger infringement to "natural freedom" than the fact you can't copy someone's song. At least the song is something that is the product of its creator. It wouldn't have existed without an act of creation. But the land is natural. It's the earth. It existed long before any property owner ever laid claim to it. Yet, we very strongly defend the right of people to exclude other people from patches of earth they didn't even create. So is it surprising that we have strong protections to allow people to exclude others from works they did create?