John Kaag is the Donohue Professor of Ethics and the Arts at UMass Lowell and External Professor at the Santa Fe Institute. His books include Hiking with Nietzsche: On Becoming Who You Are and Sick Souls, Healthy Minds: How William James Can Save Your Life (Princeton). Jonathan van Belle is an independent scholar and former philosophy editor at Outlier.org. He is also coeditor with Kaag of the anthology Be Not Afraid of Life: In the Words of William James (Princeton).