Describe symbolism in Open Veins of Latin America: Five Centuries of the Pillage of a Continent by Eduardo Galeano

Galeano note that beginning in the mid-1500s slave uprisings began to spring up. Most of the revolts were thwarted, and the guilty were sentenced to death. Several hundred years later, slaves in Haiti managed to escape to the far side of the island, where they reconstructed their former African life anew. The rainbow is to this day a symbol of their escape.