Compound Interest or Preferential Option for the Poor?

my son’s favorite bedtime stories, One Grain of Rice, an Indian mathematical folktale
by Demi. Rice is about a raja who believes he is a fair ruler, even though he keeps
almost all of the people’s rice for himself. When famine comes, the villagers have
nothing to eat but the raja orders feasts for himself. One day a local girl named Rani
comes upon an elephant carrying rice for the raja, but the rice bag is leaking. Rani
catches the falling rice in her skirt, but rather than keep it for herself,…