Linus Carl Pauling (February 28, 1901 – August 19, 1994) was an American chemist, peace activist, author, and educator. He was one of the most influential chemists in history and ranks among the most important scientists in any field of the 20th century. Pauling was among the first scientists to work in the fields of quantum chemistry, molecular biology, and orthomolecular medicine. He is one of only 4 individuals to have won multiple Nobel Prizes, the only one to win two in unrelated fields (the Chemistry and Peace prizes),[ and the only person to have been awarded each of his prizes without sharing it with another recipient.
Linus Pauling was also successful as an author and educator. His first book, The Nature of the Chemical Bond (1939), is considered influential even to this day, as is his introductory textbook, General Chemistry (1947). Later in life, he became an advocate for greatly increased consumption of vitamin C and other nutrients. He generalized his ideas to define orthomolecular medicine, which is still regarded as unorthodox by conventional medicine. He popularized his concepts, analyses, research and insights in several successful but controversial books, such as How to Live Longer and Feel Better in 1986.