I founded a launch company called International Microspace when I graduated medical school in 1989. We were trying to build a microsatellite launcher.

What is grit? Grit is refusing to give up. It's persistence. It's making your own luck.

Stuff goes wrong. Expect it, learn from it, fix it. That's how remarkable happens.

I get demoralized by organizations that start off with a mission and pull back when they find it's risky.

More than ever before in history, individuals can now band together to solve grand challenges. We face enormous problems, but we 'as individuals' have enormous power to solve them.

Research shows that the wealthier, more educated, and healthier a nation, the less violence and civil unrest among its populace, and the less likely that unrest will spread across its borders.

As lower-cost phones begin to penetrate, they'll become the educator and physician everywhere on the planet.