Answer:
John lived in an age when owners of industries operated without much interference from government. Even the income tax did not exist. Rockefeller built an oil monopoly by ruthlessly eliminating most of his competitors. This made him the richest man in the world. But he spent his retirement years giving away most of his money. The unlikely match between "Devil Bill" and Eliza Rockefeller produced a son who would paradoxically become the most hated and admired man in America.
Explanation:
