May 26th, 1995: Bill Gates sends a memo, entitled "The Internet Tidal Wave," to all executive staff within Microsoft. In it, he makes clear his intention to focus the company's efforts online with immediate effect and "assign the Internet the highest level of importance," going on to call it, "the most important single development to come along since the IBM PC was introduced in 1981."

The internet is now deeply embedded in group and organizational life in America. A new national survey by the Pew Research Center’s Internet & American Life Project has found that 75% of all American adults are active in some kind of voluntary group or organization and internet users are more likely than others to be active: 80% of internet users participate in groups, compared with 56% of non-internet users. And social media users are even more likely to be active: 82% of social network users and 85% of Twitter users are group participants.