People who feel the world is tilted against them will spawn the kind of hatred that is very dangerous for all of us. I think it's a healthy sign that there are demonstrators in the streets. They are raising the question of 'is the rich world giving back enough?'

A lot of people assume that creating software is purely a solitary activity where you sit in an office with the door closed all day and write lots of code.

DOS is ugly and interferes with users' experience.

The need to communicate effectively with your customers will come up again and again.

AIDS itself is subject to incredible stigma.

Kenya’s M-Pesa proves that when people are empowered, they will use digital tech to innovate on their own behalf.

In a system of capitalism, as people's wealth rises, the financial incentive to serve them rises. As their wealth falls, the financial incentive to serve them falls, until it becomes zero. We have to find a way to make the aspects of capitalism that serve wealthier people serve poorer people as well.