Nicholas Kristof

Maybe our best family trip started at Victoria Falls, which drenches you with spray and is so vast that it makes Niagara Falls seem like a backyard creek. Then we rented a car and made our way to Hwange National Park, which was empty of people but crowded with zebras, giraffes, elephants and more.

Why are fanatics so terrified of girls' education? Because there's no force more powerful to transform a society. The greatest threat to extremism isn't drones firing missiles, but girls reading books.

Girls' education is no silver bullet. Iran and Saudi Arabia have both educated girls but refused to empower them, so both remain mired in the past. But when a country educates and unleashes women, those educated women often become force multipliers for good.

The best escalator to opportunity in America is education.

A basic element of the American dream is equal access to education as the lubricant of social and economic mobility.

One of the aims of higher education is to broaden perspectives, and what better way than by a home stay in a really different country, like Bangladesh or Senegal? Time abroad also leaves one more aware of the complex prism of suspicion through which the United States is often viewed.

During the Arab Spring, I learned all sorts of things from Twitter. I wouldn't necessarily trust that information, but it gave me ideas about questions to ask. You can really learn things from the wisdom of crowds.

My father, a refugee from Eastern Europe, was preparing a fraudulent marriage to an American citizen as a route to this country when he was sponsored, making fraud unnecessary. My wife's grandfather bought papers from another Chinese villager to be able to come to the United States.

The Golden Temple, Sikhism's holiest shrine, is in northwestern India near the Pakistani border, and it is a delightful place to contemplate the draw of faith.

Saudi Arabia isn't the enemy, but it is a problem. It could make so much positive difference in the Islamic world if it used its status to soothe Sunni-Shiite tensions and encourage tolerance. For a time, under King Abdullah, it seemed that the country was trying to reform, but now under King Salman, it has stalled.

I took a gap year myself after high school and worked on a farm near Lyon, France. I stayed with the Vallet family, picked and packed fruit, and discovered that red wine can be a breakfast drink. That led to further travel as a university student.

My take is that the optimal approach to food, for health and ethical reasons, may be vegetarianism.

I've always been interested in public health approaches because it seems to me we have this yearning for silver bullets, and that is not in fact how change comes about. Change comes through silver buckshot - a lot of little things that achieve results. That's a classic public health approach.

I think we need to rethink a lot of business skills. In finance, for example, social impact bonds are potentially a way of providing capital for investments that save the public money in a context in which government often doesn't invest in things that would save it money.

Every high school and college graduate in America should, I think, have some familiarity with statistics, economics and a foreign language such as Spanish. Religion may not be as indispensable, but the humanities should be a part of our repertory. They may not enrich our wallets, but they do enrich our lives. They civilize us. They provide context.

Our world is enriched when coders and marketers dazzle us with smartphones and tablets, but, by themselves, they are just slabs. It is the music, essays, entertainment and provocations that they access, spawned by the humanities, that animate them - and us.

The greatest problem is not with flat-out white racists, but rather with the far larger number of Americans who believe intellectually in racial equality but are quietly oblivious to injustice around them.

What use could the humanities be in a digital age? University students focusing on the humanities may end up, at least in their parents' nightmares, as dog-walkers for those majoring in computer science. But, for me, the humanities are not only relevant but also give us a toolbox to think seriously about ourselves and the world.