For several hundred years, much of scientific advance has been about exploring human beings, including their actions and choices, in terms of mechanism — our bodies, our brains, physical processes. Research psychologist Michael McCullough believes that understanding our minds as mechanistic creates moral possibility. He’s led groundbreaking studies on the evolution and cultivation of moral behaviors such as forgiveness and gratitude. Arthur Zajonc is a physicist and contemplative, who believes that the farthest frontiers of science are bringing us back to a radical reorientation towards life and the foundations for our moral life.

Eve Ensler is a Tony Award-winning playwright, performer, and activist. She is the author of “The Vagina Monologues” and “The Good Body.” Her memoir is “In the Body of the World.” This interview is edited and produced with music and other features in the On Being episode “Eve Ensler — The Body After Cancer.” Find more at onbeing.org.

Eve Ensler has helped women all over the world tell the stories of their lives through the stories of their bodies. Her play, “The Vagina Monologues,” has become a global force in the face of violence against women and girls. But she herself also had a violent childhood. And it turns out that she, like so many Western women, was obsessed by her body and yet not inhabiting it without even knowing she wasn’t inhabiting her body — until she got cancer.

Gwendolyn Zoharah Simmons is assistant professor of religion at the University of Florida. She is also a member of the National Council of Elders. Her account of her work as an activist in the Student Nonviolent Coordinating Committee (SNCC) is featured in the book, “Hands on the Freedom Plow: Personal Accounts by Women in SNCC.” Lucas Johnson is international coordinator of the International Fellowship of Reconciliation and an ordained Baptist minister. This interview is edited and produced with music and other features in the On Being episode “Gwendolyn Zoharah Simmons and Lucas Johnson — The Movement, Remembered Forward.” Find more at onbeing.org.

Wisdom for how we can move and heal our society in our time as the Civil Rights Movement galvanized its own. Lucas Johnson is bringing the art and practice of nonviolence into a new century, for new generations. Gwendolyn Zoharah Simmons was an original Black Power feminist and a grassroots leader of the Mississippi Freedom Summer.

Brené Brown is Research Professor at the University of Houston Graduate College of Social Work. Her books include: “The Gifts of Imperfection” and “Daring Greatly: How the Courage to Be Vulnerable Transforms the Way We Live, Love, Parent, and Lead.” This interview is edited and produced with music and other features in the On Being episode “Brené Brown — The Courage to Be Vulnerable.” Find more at onbeing.org.

Courage is borne out of vulnerability, not strength. This finding of Brené Brown’s research on shame and “wholeheartedness” shook the perfectionist ground beneath her own feet. And now it’s inspiring millions to reconsider the way they live, parent, and navigate relations with members of the opposite gender.

Reza Aslan is the founder of Aslan Media, a social media network for news and entertainment about the Middle East and the world. A scholar of religions, he is currently professor of creative writing at the University of California, Riverside. His books include “Beyond Fundamentalism: Confronting Religious Extremism in the Age of Globalization,” “No God But God: The Origins, Evolution, and Future of Islam,” and “Zealot: The Life and Times of Jesus of Nazareth.” This interview is edited and produced with music and other features in the On Being episode “Reza Aslan — Islam’s Reformation.” Find more at onbeing.org.

In a probing and personal conversation, Reza Aslan opens a refreshing window on religion in the world and Islam in particular. It’s a longer view of history and humanity than news cycles invite — certainly when it comes to the Arab Spring, or to ISIS. His life is a kind of prism on the fluid story of religion in this century. But in a globalized world, we all have a personal stake in how this story unfolds.

Bernard Chazelle is Eugene Higgins Professor of Computer Science at Princeton University. He is a fellow of the Association for Computing Machinery, the American Academy of Arts and Sciences, the John Simon Guggenheim Memorial Foundation, and a member of the European Academy of Sciences. He’s authored an extensive collection of essays on music for A Tiny Revolution. This interview is edited and produced with music and other features in the On Being episode “Bernard Chazelle — Discovering the Cosmology of Bach.” Find more at onbeing.org.