How an interview project 'shows the continuity of the human family'

National Geographic Explorer Paul Salopek utilizes a systematic "milestone" methodology during his decade-long, multi-continent "Out of Eden Walk" to document a global portrait of humanity. Every 100 miles, he interviews the first person he encounters using three fundamental questions: "Who are you?", "Where do you come from?", and "Where are you going?" This approach, inspired by biological transects, captures a diverse cross-section of human experience, ethnicities, and cultures. While the process often involves navigating significant cultural and gender-based barriers, these interactions provide a raw, serendipitous record of human life. By the end of his 22,000-mile journey, this collection of oral histories will serve as a comprehensive gallery of the human family at the turn of the millennium, preserving the voices and faces of individuals encountered along his path.