The Committee to Nuke Elysium

If it were a physical nation, it would now be the third most populous on earth. Mr Zuckerberg is confident there will be a billion users in a few years. Facebook is unprecedented not only in its scale but also in its ability to blur boundaries between the real and virtual worlds.

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Facebook has certainly tried to guide the development of its online economy, almost in the way that governments seek to influence economic activity in the real world, through fiscal and monetary policy. Earlier this year the firm said it wanted applications running on its platform to accept its virtual currency, known as Facebook Credits. It argued that this was in the interests of Facebook users, who would no longer have to use different online currencies for different applications. But this infuriated some developers, who resent the fact that Facebook takes a 30% cut on every transaction involving credits.

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Facebook’s success “raises a lot of issues that we thought were a generation away,” says Edward Castronova, a professor at Indiana University. One of them is how much impact virtual economies and currencies will have on real world ones. The Chinese government has repeatedly curbed virtual currencies. Last year it banned their use to buy real-world goods and services, in part because of concerns about the impact on the yuan.