Final answer:
Andrew Carnegie's Gospel of Wealth philosophy introduces the idea that wealthy individuals have a responsibility to contribute to the betterment of society, particularly through philanthropy.
Step-by-step explanation:
The idea that the wealthiest individuals should give back for the betterment of society is most closely associated with Andrew Carnegie's Gospel of Wealth philosophy. Carnegie, a self-made steel magnate, held the belief that those who had succeeded had a duty to use their wealth to improve the lives of the less fortunate. His views were encapsulated in his famous essay, The Gospel of Wealth, where he argued that the affluent should be philanthropic and support public works such as libraries, hospitals, and universities. Carnegie's perspective differed significantly from contemporaries like Rockefeller and Morgan, who focused more on the accumulation and control of wealth rather than its distribution for the public good.