Ofir was in the hut of a Nigerian pastor named Leo when he found a document listing the percentages of Christians and Muslims in various tribes. More than a hundred tribes were listed, all with the percentage of converts. Flipping through the pages, he spotted the lone gap in the data. Just one tribe had no numbers beside it. Instead were the words, “Hostile Animists.” The tribe was the Achipawa. It would take Ofir more than a year to find them. The first photo is of Pastor Leo in his church in Nigeria, the second of a cricket that Leo offered to Ofir on the day he arrived in the village.