John Kaag is the Donohue Professor of Ethics and the Arts at UMass Lowell, External Professor at the Santa Fe Institute, and the author of Sick Souls, Healthy Minds: How William James Can Save Your Life (Princeton), American Philosophy: A Love Story, and Hiking with Nietzsche: On Becoming Who You Are. Jonathan van Belle is an independent scholar and former philosophy editor at Outlier.org. Kaag and van Belle are also the authors of Henry at Work: Thoreau on Making a Living (Princeton).