Adnan Oktar (born Ankara, 1956), also known by his pen name Harun Yahya, is a prominent advocate of Islamic creationism in the creation-evolution debate. He is considered to be the leading Muslim advocate of creationism. He subscribes to Old Earth creationism. He is against Zionism and Freemasonry and sees them as very interrelated movements, though he denounces anti-Semitism and terrorism, which he says is a product of Darwinism, not religious fanaticism.
Adnan Oktar founded the Science Research Foundation (SRF, or BAV in Turkish), whose objective is "to [establish]...peace, tranquility and love..."