Chudacoff goes into detail on how communication changed throughout the 17th century; at first there were letters as the only means of communicating with others over a long distance, but then there were telegraphs and phones. Letters were also used for communication for information such as during war or just to see how someones family is doing. To date, we have cellphones and the internet for information and communication. I can send someone an email or even text someone across the globe in China. Below is a link to a youtube on the age of communication.
http://www.youtube.com/watch?v=J-7SpsrbxNE
