Ayatullah Sheikh Muhammad Kazim Khurasani (; 1839 – 12 December 1911), commonly known as Akhund Khurasani () was a Shia jurist and political activist.

He is known for using his position as a Marja as legitimizing force behind the first democratic revolution of Asia that happened in Iran (1905–1911), where he was the main clerical supporter of the revolution. He believed that the democratic form of government would be the best possible choice in the absence of Imam and regarded the democratic constitutional revolution a Jihad (holy war) in which all Muslims had to participate.

Muhammad Kazim Khurasani

Along with Mirza Husayn Tehrani and Shaikh Abdallah Mazandarani, he led people against what they called a "state tyranny", issued fatwas, and "sent telegrams to tribal chiefs, prominent national and political leaders, and heads of state in England, France, Germany, and Turkey".

Muhammad Kazim Khurasani

When Mohammad Ali Shah became king of Iran, Mohammad Kazim Khorasani sent him a 'ten-point' instruction including points on protecting Islam, promoting domestic industries and modern science, stopping colonial intervention in Iran 'while retaining diplomatic relations', and establishing 'justice and equality'.

Muhammad Kazim Khurasani

He is regarded as one of the most important Shia Mujtahids of all times, and the title Akhund (the scholar) is almost exclusively used for him. He started to deliver his lectures at Najaf seminary in 1874 CE, when his mentor Syed Mirza Muhammad Hasan Shirazi left for Samarra and appointed him as his successor.

He became a source of emulation in 1895 and he taught for years in Najaf until his death in 1911 CE and trained a significant number of students from different regions of the Shi'ite world. All major Shia jurists in the twentieth century were in some way related to his circle. He was known for his credibility, independent thinking and intellectual rigor. His most famous work Kifayat al-Usul (Sufficiency of Principles ()), published in 1903 established him as the supreme authority on Shia theology, where he presented the Shi'ite jurisprudential principles in a more rigorous fashion as a unified theory of jurisprudence. It was recently published for 453rd time.

This book is considered the pinnacle of advanced theology and foundation of Usul al-Fiqh in Shia seminaries of Najaf and Qom. All major Shia jurists following Akhund Khurasani have written commentaries on it, the best known is written by Ayatullah al-Khoei.

Lifestyle and Education

Khurasani was born in Tus, a small town near Mashhad, in 1839 CE. His father, Mullah Hussain Heravi hailed from Herat, who was a cleric and a silk merchant. In 1850, he came to Mashhad to attend a Shi'ite seminary, Madrassa Ismail Khan. By 1856, he had completed the early education (sutuh) and got married.

At age 22, he left for Sabzevar, where he stayed for three months and got familiar with islamic philosophy under Molla Hadi Sabzavari. He wanted to go to Najaf but due to lack of funds, he delayed his departure and stayed in Tehran where he continued Islamic philosophy under Mulla Husayn Khoʾi at the Sadr seminary and completed his studies in Logic.

In 1862, he moved to Iraq and in Najaf followed the open lectures of the great Shi'ite jurist Ayatullah Shaykh Murtaza Ansari. Simultaneously he participated in open lectures of Ayatullah Mirza Hassan Shirazi, who later became famous for his campaign against the tobacco concession. He studied about two years under Murtaza Ansari.

After the death of Murtaza Ansari in 1864 CE, Mirza Hassan Shirazi became highest marja-e taqlid ("sources of emulation") of the Shi'ite world. Akhund Khurasani continued studying under him until his migration to Samarra in 1875 CE.

Like most seminary students, Khurasani lived a humble life, and he had to bear loss of loved ones. Because of lack of money, he could only fulfill immediate needs and was content with the basic amenities offered by the office of the Marja.

After marriage, he couldn't take his wife with him to Najaf and left her in Mashhad, due to lack of finances. He was informed of the death of his first child soon after arriving in Najaf. His wife joined him later but in 1864 CE, died after giving birth to the second child. It took years before Akhund decided to marry again in 1873 and had four children: Mirza Mahdi Khurasani (1875–1945), Mirza Muhammad (1877–1937), Mirza Ahmad Kifa’i Khurasani (1912–1971), and Zahra (1891–1956). His second wife died from a chronic illness, and Khurasani married for the last time in 1895 and fathered two sons: Hussain Aqa (1901–?) and Hassan Kifa’i (1902–1954).