John D. Rockefeller is often considered one of histories richest people. His journey to Entrepreneurial success and business fame started at an early age. He grew up with a tough childhood, his father would often leave and even had a secret second family in Canada. Rockefeller knew he could not pay for a higher education so at the young age of 16 he went to work at an accounting firm as an assistant bookkeeper. He quickly distinguished himself among his peers and teamed up with some local merchants in Cleveland to start a produce shipping company. Rockefeller achieved moderate success at a young age but quickly pivoted to what he would be famous for, the emerging Oil industry. Rockefeller was able to capitalize on his current success to shift into the new market at a perfect time. While most of the companies getting in on the oil rush at this time where rushing to drill oil in the newly discovered oil fields of Pennsylvania Rockefeller knew that the oil was useless until it had been refined so while the market had too many drillers Rockefeller put all his efforts into refining the Oil. He was very successful at this because of his focus on efficiency and chemical innovations, he despised any type of waste. His success continued as he grew older he continued to expand and bought out much of his competition offering generous stock deals to join his Oil Empire. This gave him a dream time of the best oil Entrepreneurs on his team. This company was Standard Oil which became the largest company in the U.S and was technically a monopoly. This led to it later being broken up by the U.S government though this did not effect Rockefeller much as the next years he made his biggest fortunes off of the new automobile industry. Today the Standard Oil company is the origin for almost all major U.S Oil Companies like Exxon and Chevron.