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.
But like Apple Music, the paid-for (Premium) subscription for Spotify is Â£9.99 per month and offers unlimited streaming with no ads at a higher quality (we'll talk more about quality in a moment). Apple also offers a family package for Apple Music, which works through Family Sharing. Find out more about Family Sharing here. Six individual linked accounts can have access to Apple Music at a cost of Â£14.99 per month with the Family membership option.