Berlin definitely has one of the most vibrant of the startup scenes that I have seen. Not really just across Europe, but across the whole world in terms of cities. It's an interesting dynamic.

Why are most chess masters under 30?

If you actually do something you love it's a lot easier and takes on a lot more purpose.

Facebook is inherently viral.

I personally don't invest in a lot of companies because I think it would be a conflict of interest and Facebook doesn't typically either.

Nothing influences people more than are commendation from a trusted friend.

In a recent survive of Millennials around the world asking what most defines our identity, the most popular wasn't nationality, ethnicity or religion. It was "citizen of the world." That's a big deal. Every generation expands the circle of people we consider one of us. And in our generation, that now includes the whole world. This is the struggle of our time. The forces of freedom, openness, and global community against the forces of authoritarianism, isolationism, and nationalism - forces for the flow of knowledge, trade, and immigration, against those who would slow them down.