Who knows where stories come from. My novel Comandante Ibarra, the first book in a trilogy of three love stories, was about a Mexican rural policeman, or as they say in Spanish a Rural. He had had had a stroke from which he had mostly recovered. But it changed his thinking about the Mexican constitution of 1857 which had not granted many rights to the Yaqui Indians of the Mexican State of Sonora just below Arizona.
For hundreds of years the Spanish crown and then the governments of Sonora in Mexico had been trying to wipe out the Yaquis and take their rich farmlands and water for themselves. And they are still at, the state and the federal governments. Then a few years passed and I began a sequel to the second novel in the trilogy: Playing for Pancho Villa