In a world where everything seems to have been done already, Jason Lewis has pulled off something entirely unique: circumnavigating the globe using only human power. No planes, motors or metal–just mental and physical endurance, along with the help of total strangers.
Since his 13-year, 45,000-mile journey, Lewis has written a series of award-winning books documenting his travels, with the latest installment slated for release in May. Perhaps more importantly, though, he’s returned with a renewed perspective on the environment, humankind’s interaction with it and the importance of living within Earth’s biophysical limits. I recently sat down with Lewis to discuss his trip and what he’s learned.