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.
When you buy music from iTunes, it can be automatically synced to all of your iOS devices, and it won't count against your free storage. A paid service called iTunes Match is completely separate from iCloud, and syncs any music you haven't purchased from iTunes for $25 per year. new service called Photo Stream allows you to download your 1,000 most recent photos to a computer or other iOS device for 30 days. You can also store a device's entire camera roll in iCloud for longer. Third-party apps will be able to use iCloud as well.