The Rule That Never ChangedIf the count isn’t seen, it doesn’t count. Kito Barasa learned this early. On a quiet afternoon in his Ethiopian town, he crouched in the ochre dust with a chalk stub in hand. Five shells rested in his palm. He tossed one into the air, caught it, scooped another from the ground before the rest fell. Every move was in the open. Every point was called aloud. To Kito, it was a game. To his grandmother, it was training. The record must be seen, she told him. If it isn’t...