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Second machine age: Will robots put us all out of work?

23 April 2014 Last updated at 11:50 BST

Humanity is entering a second machine age. During the first, driven by the industrial revolution, machines took over all the muscle jobs. In their place though, technology created huge numbers of jobs where you had to use your brain.

But a new book suggests that machines, in the shape of robots and computers, are about to take over most of these, with profound impacts on our society and economy.

BBC Newsnight's technology editor David Grossman reports.

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