All of us are surrounded by brands. Designer brands. Bargain-shopper brands. Brands for seemingly every demographic slice among us. But have you ever stopped to ask yourself how brands influence you? This week, we look at how companies create a worldview around the products they sell, and then get us to make those products a part of who we are.

More than 70,000 people died of drug overdoses in 2017 — many of them from heroin and other opioids. One of the most widely-used tools to confront this crisis is a drug called naloxone. It can reverse an opioid overdose within seconds, and has been hailed by first responders and public health researchers. But in 2018, two economists released a study that suggested naloxone might be leading some users to engage in riskier behavior — and causing more deaths than it saves. This week, we talk with researchers, drug users, and families about the mental calculus of opioid use, and why there's still so much we're struggling to understand about addiction. This episode originally aired in October 2018.

Does living with animals really make us healthier? Why do we eat some animals and keep others as pets? This week on Hidden Brain, we talk with psychology professor Hal Herzog about the contradictions embedded in our relationships with animals.

Are women named Virginia more likely to move to Virginia? Are people with the last name of Carpenter more likely to be carpenters? This week on Hidden Brain, we bring you a favorite 2017 episode about our preference for things that remind us of ourselves, and why this tendency can have larger implications than we might at first imagine.

Generations of Americans have struggled against segregation. Most of us believe in the ideal of a colorblind society. But what happens when that ideal come up against research that finds colorblindness sometimes leads to worse outcomes?

Many of us intuitively feel that the bitter partisanship of American politics is bad for our nation. So should we be concerned about the health of our democracy? This week on Hidden Brain, we revisit two of our favorite conversations about U.S. politics. We start by talking with political scientist John Hibbing about the psychological differences between liberals and conservatives. Then, we explore the role of conflict in democracy with historian David Moss.

It happens to all of us: someone recognizes you on the street, calls you by name, and says hello. You, meanwhile, have no idea who that person is. Researchers say this struggle to read other faces is common. This week on Hidden Brain, we revisit a favorite 2016 episode about "super-recognizers" and the rest of us.

Smarts matter. But other factors may play an even bigger role in whether someone succeeds. This week, we speak with Nobel Prize-winning economist James Heckman about the skills that predict how you'll fare in life. We'll also look at programs that build these skills in the neediest of children – and new research that suggests the benefits of investing in kids and families can last for generations.

If you've taken part in a religious service, have you ever stopped to think about how it all came to be? How did people become believers? Where did the rituals come from? And what purpose does it all serve? This week, we bring you a July 2018 episode with social psychologist Azim Shariff. He argues that we should consider religion from a Darwinian perspective, as an innovation that helped human societies to thrive and flourish.

Placebos belong in clinical trials, not in the doctor's office. That's the conventional wisdom, anyway. This week, we ask what placebos might teach us about healing.