Just take ease of interchange between people. Your email is...

Just take ease of interchange between people. Your email is of course faster than letter - on the other hand the transition from sailing ship to telegraphs was far greater than the shift from the postal service to email. That was a fabulous change. If you sent a letter to England, instead of waiting a couple of months for a response you got it instantly. That's a huge change. Every one of these changes of course increases opportunities and also increases means of control and domination.