John D. Rockefeller, the founder of Standard Oil and one of the wealthiest individuals in history, wrote 38 letters to his son Nelson between 1912 and 1922. These letters were not just personal correspondence but a collection of wisdom, advice, and guidance on various aspects of life. Rockefeller's intention was to share his experiences, values, and principles with his son, hoping to shape Nelson's future and prepare him for the responsibilities that came with being a member of the Rockefeller family.

Rockefeller also shares his experiences on decision-making, risk-taking, and innovation. He advises Nelson to be bold and take calculated risks, stating, "The way to get started is to quit talking and begin doing." (Letter 10) These principles served Rockefeller well in building his business empire and remain relevant for entrepreneurs and leaders today.

Rockefeller's philanthropic endeavors are well-documented, and the letters reflect his commitment to giving back to society. He writes to Nelson about the importance of philanthropy, stating, "The man who dies thus rich dies disgraced." (Letter 31) Rockefeller's philanthropic philosophy was centered around using his wealth to improve society and make a lasting impact.