We are experiencing a communications revolution that began in the 1960s with the birth of the pre-cursor to the internet, but entered a significant new phase in 2004 with the arrival of Web 2.0.
This is an iteration of the web where ordinary users can add words, pictures, sounds and video. A simple idea in theory which in practise signifies the transfer of control of the internet from the few to the many. It is the democratisation of the internet.
The phrase web 2.0 was coined in 2004 but nothing fundamentally changed that year from a technological point of view. The tools that were available to create Web 2.0 environments already existed. What changed was the way that people started to view the internet.