When Rousseau wrote his social theory, concepts of liberty and freedom were not new ideas. Hints of social contract reasoning are found in earlier works, most notably in Book 2 of Plato's dialog The Republic, as well as, in Socrates.
The total spending per iTunes account is $43 per year across all media, says Dediu. At 575 million iTunes accounts, that works out to $24.7 billion of consumer spending at iTunes per year. The average iTunes account's annual spending on software has followed music's trend, falling to $9 from $42 in 2008. However, average annual spending on apps has gone in the opposite direction, rising to $16 this year from $7 in 2008.
If you've ever wanted to give an iTunes song or movie to a friend on Facebook, you now can do it with Facebook Gifts. Starting today, Facebook users in the U.S. can send their friends iTunes digital gifts instantly through the service. The digital gift amounts are set at $10, $15, $25 or $50.