We citizens of the affluent countries tend to discuss our obligations toward the distant needy mainly in terms of donations and transfers, assistance and redistribution: How much of our wealth, if any, should we give away to the hungry abroad?

If I were surrounded by angels who were purely rational and had no inclinations at all, I couldn't do anything for them. I couldn't make them happy; I couldn't make them sad, I would be entirely useless as a moral agent.

It seems far-fetched, even preposterous, to blame the global economic order for the persistence of severe poverty in countries that are ruled by obvious thugs and crooks.

The cost of research, development and testing of a new drug is vastly greater than the cost of each dose produced. How should we pay for new medicines? Innovators should be rewarded according to the impact of their medicine, and people should contribute to these rewards according to their ability to pay.

I am, as a father, very worried about the growing evidence of the impact of social media on children’s mental health."

Exercise is overrated.

You can always improve your fitness if you keep training.

Like I said, everybody has got something they have to deal with health-wise, and everybody's human. I should look after myself better, but so should everybody, right?