A firm is successful when the costs of directing employee effort are lower than the potential gain from directing.

Indeed, the best practical reason to think that social media can help bring political change is that both dissidents and governments think they can. All over the world, activists believe in the utility of these tools and take steps to use them accordingly. And the governments they contend with think social media tools are powerful, too, and are willing to harass, arrest, exile, or kill users in response.

There is no news industry.

The whole, 'Is the internet a good thing or a bad thing'? We're done with that. It's just a thing. How to maximise its civic value, its public good - that's the really big challenge.

It used to be expensive to make things public and cheap to make them private. Now it's expensive to make things private and cheap to make them public.

The loss of control you fear is already in the past.

[T]he ways in which the information we give off about our selves, in photos and e-mails and MySpace pages and all the rest of it, has dramatically increased our social visibility and made it easier for us to find each other but also to be scrutinized in public.