With Foursquare, our original app was a good idea but it wasn't a hundred million users good idea. The data behind the app, and what we do with the data? That's our good idea. That's our hundred million dollars in revenue idea.

A brand has to be authentic and be born of a personal passion. If you, its creator, doesn't want the product, no one else will. If you want it, chances are it will be wanted around the world. Desires are universal and speak in every language.

Diamonds are rare, there haven't been any major finds for over 20years, and there are no major mines on the horizon. Demand- particularly in China and India- is growing rapidly, and in the very near future we will see demand outpace plateauing supply.

The cumulative impact of these legal instruments indicates, perhaps unsurprisingly, that initiating war is rarely, if ever, lawful. However, responding to acts of war can be justified.

We engage in this kind of behaviour even more enthusiastically when we're anxious about being excluded or left out.