There is a famous quote from French existentialist philosopher Jean-Paul Sartre: “Hell is other people.” While some may agree with that sentiment and crave solitude, there’s a lot of evidence that people are drawn to each other. We form friendships, sports teams, knitting circles and complex societies, unlike any other species on Earth.

Nicholas Christakis, a doctor, sociologist, and author of “Blueprint: The Evolutionary Origins of a Good Society,” has spent years trying to understand why people often feel compelled to connect to - and help - each other. The answer he arrived at was that, although humans are capable of a lot of bad things, it turns out being good has long been coded into our biology

Childhood today is radically different than it was just a few generations ago. These days, kids’ busy schedules include school, homework, chores, sports, music lessons and other activities. But those packed schedules leave out one key element that turns out to be crucial to growth and learning — play. That’s according to Dorsa Amir, a postdoctoral researcher and evolutionary anthropologist at Boston College.

Amir has studied the Shuar people of Ecuador, a non-industrialized society, and observed startling differences in how Shuar children and American children spend their time. She tells us how childhood has changed drastically, and how that affects kids today.

We spend more on medical care than any other developed country in the world - almost twice the average - but the U.S. lags behind many other wealthy nations on outcomes such as infant mortality and life expectancy. How did we get here?

Christy Ford Chapin, a historian at the University of Maryland Baltimore County and author of “Ensuring America's Health: The Public Creation of the Corporate Health Care System,” explains how what she calls “the insurance company model” was invented.

And although reducing health care costs is a priority for voters, Jonathan Cohn, a senior national correspondent at HuffPost and author of the book “Sick: The Untold Story of America's Health Care Crisis - and the People Who Pay the Price,” says forces that have hindered reform efforts in the past will almost certainly present pitfalls again in the future.

Breaking persistent cycles of poverty may seem an impossible task, but the findings of a landmark government social experiment tell a different story.

Back in the mid-1990s, a program called “Moving to Opportunity” gave some families, living in troubled public housing projects in five large cities, vouchers and additional assistance to move away to low-poverty neighborhoods. Lawrence Katz, a professor of economics at Harvard University and the principal investigator of the long-term evaluation of the initiative, explains why the initial results were surprising. He also discusses encouraging new research from an experiment in the Seattle area that helps low-income families move to neighborhoods with better opportunities and outcomes for children.

It often feels like trash is piling up all around us, and that our consumption habits have put us on the road to environmental disaster. Just take a look at recycling bins stacked high with Amazon boxes and takeout containers.

But research shows that we’re actually using fewer resources than we were 25 years ago, a process called “dematerialization.” That’s according to Andrew McAfee, the Co-Director of the Initiative on the Digital Economy at the MIT Sloan School of Management and the author of “More From Less: The Surprising Story of How We Finally Learned to Prosper Using Fewer Resources - and What Happens Next.” He explains why we’re using less, and whether we can expect that trend to extend into the future.

Are you a self-proclaimed germaphobe like President Trump? Well, if you think your home is sparkling clean, try walking around with a microscope. According to Rob Dunn, a professor of Applied Ecology at both North Carolina State University and the Natural History Museum of Denmark, we are surrounded by thousands of tiny species, living on every imaginable surface. And while some bacteria can be harmful, most just humbly co-exist with us... and some are more helpful than we know.

In his book, “Never Home Alone: From Microbes to Milipedes, Camel Crickets, and Honeybees, the Natural History of Where We Live,” Dunn takes a safari through our homes, introducing us to these invisible creatures and explaining how, despite our fervent efforts to sanitize the world, we may be negatively affecting our own health.

Obsessed with work, insensitive, socially detached, and neglectful of family and friends. Those may not be the most endearing qualities, but they are just a few of the common characteristics that longtime innovation researcher, Melissa Schilling found when studying some of the world’s most famous and prolific inventors in the fields of science and technology.

Schilling, a professor of management and organizations at New York University’s Stern School of Business, explores the ingenuity of eight outstanding innovators, including Albert Einstein, Marie Curie, Steve Jobs, Elon Musk and more. She’s the author of, “Quirky: The Remarkable Story of the Traits, Foibles, and Genius of Breakthrough Innovators Who Changed the World.”

We’ve all got friends — hundreds of them, if you believe what Facebook’s telling you — but many of us are still worried about being lonely. So worried that it might be surprising to learn that hundreds of years ago, being alone was considered a virtue. But according to Susan Matt and Luke Fernandez, both professors at Weber State University, how we view emotions is changing all the time.

Matt and Fernandez, authors of “Bored, Lonely, Angry, Stupid: Changing Feelings about Technology, from the Telegraph to Twitter” explain how technology influences the way we see loneliness, boredom, and a whole host of other emotions.

Many adults and teens are spending longer and longer hours engaged with digital media, and researchers are only beginning to grasp the impact on mental health and well-being.

Doreen Dodgen-Magee, a psychologist and the author of “Deviced! Balancing Life and Technology in a Digital World,” discusses how screens are profoundly altering who we are and how we behave. She points to concerns about increased feelings of loneliness, anxiety, and a reduced ability to tolerate boredom and to concentrate, but Dodgen-Magee says there are methods to help us all use technology in healthier ways.

Whether they’re athletes like LeBron James, entrepreneurs like Steve Jobs, or entertainers like Kanye West, the richest and most famous among us are often known for having the largest egos. Why shouldn’t we follow their example?

Ryan Holiday, author of “Ego is the Enemy,” tells us how ego can be a huge disadvantage - and even end careers. He also explains why he thinks our ego problem is getting worse, and what he believes we can do about it.