prosfilaes
Adventurer
But what you say here is not correct: if I make an unauthorised copy of a book, the owner of the copyright has lost something, namely, their capacity to regulate the making of copies of that book.
Is custody of a child property? Because the owner of the custody can lose their exclusive right to raise a child. If you start phrasing things that way, there's very few laws that can't be stated in terms of property; assault, rape, speeding (the government's capacity to regulate the speed limit on a road), violating FCC broadcast regulations, as I pointed out before libel and slander.
Also, exclusivity is not essential to property: my bank account - which is, as a matter of law, a right to call upon the bank to pay me money - is not exclusive. Many more people have accounts with the bank than just me, and many more have accounts than the bank's capacity to pay out money at any given time. My bank account is still property, however. For example, it is assignable, chargeable etc.
In practice, if you have $1000 in the bank, it's like having $1000 stored under your mattress, only more convenient. The federal government guarantees that you can get your money back through the FDIC. The fact that it is assignable, chargeable, etc. depends on the fact that considering the fungible nature of money, it's as if you did have an exclusive chunk of money sitting in the account.