The key tech was too process information and distribution in the 20th century. <span />
Energy and food still lead. then machinery, transportation, and fabrics
then biotech, luxuries, and the others fall in somewhere
Answer:
Andrew Carnegie went a long way in creating a monopoly in the steel industry when J.P. Morgan bought his steel company and melded it into U.S. Steel.
John Adams is, to some effect, the forgotten founding father (other than Hamilton). He was a part of the Comittee that wrote the Declaration, was instrumental in securing funds for America during the revolutionary war, helped negotiate the Treaty of Paris, and served as Vice President and President.
In the way of lasting impacts, he was very helpful in forming the United States for both the Declaration of Independence and the Constitution, as one of his writings, "Thoughts on Government".