As a lonely teenager growing up in Virginia, I fed off any pop culture that could show me different ways of being from what I saw on 'The Cosby Show' reruns or read about in an Ann M. Martin book.

It took me years to find a program that kept me in shape: Gyms felt intimidating, and women's magazines seemed tailored for toning the bodies of already trim white women.

In America, mixed-race identity tends to invite both curiosity and suspicion, largely because few have found a way to interrogate it without centering whiteness as the scale by which to evaluate blackness.

The American understanding of China is filtered through years of politics; we rarely see the culture on its own terms.

We need to start training more primary health providers and fewer specialists. We will never be able to control health care costs unless we challenge the over-emphasis on medical research, specialists and technology and put more emphasis on delivering good, everyday basic medicine to those who now have none.

Technology is only meaningful when it reaches the people.

All around the world, we send our top talent into finance, technology, medicine and law - everywhere but towards expanding opportunity for our most marginalized children.

Attacks on Internet sites and infrastructure, and the compromise of secure information, pose a particularly tricky problem because it is usually impossible to trace an attack back to its instigator.