“Wilderness trails constitute a rare space in America marked by economic diversity. Lawyers and construction workers get bitten by the same mosquitoes and sip from the same streams; there are none of the usual signals about socioeconomic status, for most hikers are in shorts and a T-shirt and enveloped by an aroma that would make a skunk queasy.”

“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.”

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

“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.”

“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.”

“The best escalator to opportunity in America is education.”

“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.”