Today, human exceptionalism is the norm. Despite occasional nods to animal welfare, we prioritize humanity, often neglecting the welfare of a vast number of beings. As a result, we use hundreds of billions of vertebrates and trillions of invertebrates every year for a variety of purposes. We also plan to use animals, AI systems, and other nonhumans at even higher levels in the future. Yet as the dominant species, humanity has a responsibility to ask: Which nonhumans matter, how much do they matter, and what do we owe them in a world reshaped by human activity and technology?

At noon on October 27, 1924, a factory worker was admitted to a hospital in New York City, suffering from hallucinations and convulsions. Before breakfast the next day, he was dead. Alice Hamilton was determined to prevent such a tragedy from happening again. By the time of the accident, Hamilton had pioneered the field of industrial medicine in the United States. She specialized in workplace safety years before the Occupational Safety and Health Administration was created. But this time, she was up against a formidable new foe: America’s relentless push for progress, regardless of the cost.

Despite the key part he played in the country's founding, few Americans today have heard of John Dickinson. Early chroniclers and historians, seeking to create a patriotic narrative and taking their cues from his political enemies, cast him as a coward and Loyalist for not signing the Declaration. Many later historians have simply accepted and echoed this distorted and dismissive view. Jane Calvert's fascinating, authoritative, and accessible biography restores him to a place of prominence in the nation's formative years.

World War II loomed over the latter half of the twentieth century, transforming every level of American society and international relationships and searing itself onto the psyche of an entire generation, including that of seven American presidents: Dwight D. Eisenhower, John F. Kennedy, Lyndon B. Johnson, Richard Nixon, Gerald Ford, Ronald Reagan, and George H. W. Bush. The lessons of World War II, more than party affiliation or ideology, defined the presidencies of these seven men.

Eliot Stein has traveled the globe in search of remarkable people who are preserving some of our most extraordinary cultural rites. In Custodians of Wonder, Stein introduces listeners to a man saving the secret ingredient in Japan's 700-year-old original soy sauce recipe. In Italy, he learns how to make the world's rarest pasta from one of the only women alive who knows how to make it. And in India, he discovers a family rumored to make a mysterious metal mirror believed to reveal your truest self.