Things like depression and obesity are global challenges.

Cory Doctorow is a fast and furious storyteller who gets all the details of alternate reality gaming right, while offering a startling, new vision of how these games might play out in the high-stakes context of a terrorist attack. Little Brother is a brilliant novel with a bold argument: hackers and gamers might just be our country's best hope for the future.

I see a future in which games once again are explicitly designed to improve quality of life, to prevent suffering, and to create real, widespread happiness.

Clinically speaking, depression is a pessimistic sense of your own capabilities, and despondent lack of energy.

If you are a gamer, it’s time to get over any regret you might feel about spending so much time playing games. You have not been wasting your time. You have been building up a wealth of virtual experience that, as the first half of this book will show you, can teach you about your true self: what your core strengths are, what really motivates you, and what make you happiest.

We can boost our immune systems by strengthening our social networks and decreasing stress.

My goal for the next decade is to try to make it as easy to save the world in real life as it is to save the world in online games.