<human>:  Who was the founder of anti-realism?
<bot>: The founder of anti-realism is usually considered to be Bertrand Russell. Russell was an English philosopher and mathematician who is best known for his work in logic, mathematics, philosophy, and the theory of knowledge. He was a pioneer in the development of mathematical logic, and his work on the foundations of mathematics is of fundamental importance to modern mathematics. He was also a major figure in the philosophy of mathematics, and in the philosophy of mind.