Imam Ahmad ibn Hanbal was a prominent Islamic scholar and theologian born in 780 CE in Baghdad. He is best known as the founder of the Hanbali school of thought, one of the four major Sunni schools of Islamic jurisprudence. His teachings emphasized strict adherence to the Qur'an and Hadith, advocating for a return to the original sources of Islam. Imam Ahmad faced significant persecution for his beliefs, particularly during the Mihna, a period of religious inquisition. Despite this, he remained steadfast in his principles, earning respect and admiration among Muslims. His works, including the famous Musnad Ahmad, continue to influence Islamic thought and practice today.