[[Tiedosto:John D. Rockefeller 1917 painting.jpg|thumb|Maalaus John D. Rockefelleristä vuodelta 1917.]]
Rockefellerin ura öljybisneksen parissa oli hyvin pitkä ja tuottoisa. Vetäydyttyään öljybisneksestä Rockefeller harjoitti pitkään hyväntekeväisyyttä.
[[Allan Nevins]] kirjoitti John D. Rockefelleristä seuraavaa:
:The rise of the Standard Oil men to great wealth was not from poverty. It was not meteor-like, but accomplished over a quarter of a century by courageous venturing in a field so risky that most large capitalists avoided it, by arduous labors, and by more sagacious and farsighted planning than had been applied to any other American industry. The oil fortunes of 1894 were not larger than steel fortunes, banking fortunes, and railroad fortunes made in similar periods. But it is the assertion that the Standard magnates gained their wealth by appropriating "the property of others" that most challenges our attention. We have abundant evidence that Rockefeller's consistent policy was to offer fair terms to competitors and to buy them out, for cash, stock, or both, at fair appraisals; we have the statement of one impartial historian that Rockefeller was decidedly "more humane toward competitors" than Carnegie; we have the conclusion of another that his wealth was "the least tainted of all the great fortunes of his day."<ref>Lahtam, Earl (1949). ''John D. Rockefeller: Robber Baron or Industrial Statesman?''. s. 104</ref>
[[Ron Chernow]]in kirjoitus Rockefelleristä kertoi seuraavaa:<ref>Visser, Wayne (2011). ''The Age of Responsibility: CSR 2.0 and the New DNA of Business''. John Wiley & Sons. ISBN 9781119973386.</ref>
:What makes him problematic—and why he continues to inspire ambivalent reactions—is that his good side was every bit as good as his bad side was bad. Seldom has history produced such a contradictory figure.<ref>''Titan: The Life of John D Rockefeller, Sr.'' New York: Random House, 1998. ISBN 978-0-679-75703-0.</ref>
Vuonna 1902 Rockefellerin omaisuuden arvo oli 200 miljoonaa Yhdysvaltain dollaria. Hänen kuolemansa aikoihin 1937 hänen omaisuutensa arvo oli 1.4 miljardia dollaria, joka olisi nykyrahassa paljon suurempi omaisuus kuin esimerkiksi [[Bill Gates]]in tai [[Sam Walton]]in.<ref>[http://www.celebritynetworth.com/articles/entertainment-articles/30-richest-americans-time-inflation-adjusted/#!/1-john-d-rockefeller-net-worth-340-billion_756/ The 40 Richest Americans of All Time]</ref>
Rockefeller itse tiivisti elämänsä seuraavasti:<ref>http://www.anbhf.org/pdf/lee.pdf</ref>
:I was early taught to work as well as play,<br>My life has been one long, happy holiday;<br> Full of work and full of play—<br>I dropped the worry on the way—<br>And God was good to me everyday.
== Katso myös ==