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.
In less than 10 years, iTunes has become so embedded in peopleâs everyday lives that it has all but disappeared into the overall fabric of our digital commerce. Itâs hard to remember a time when selling a song by itself for $3.49 was an option, which it was, at least as a proposal, before iTunes came along.