Madhav Sadashivrao Golwalkar (19 February 1906 – 5 June 1973), popularly known as Guruji was the second Sarsanghchalak ("Chief") of the Rashtriya Swayamsevak Sangh (RSS). Golwalkar is considered one of the most influential and prominent figures among Rashtriya Swayamsevak Sangh. He was the first person to put forward the concept of a cultural nation called "Hindu Rashtra" which is believed to have evolved into the concept of the "Akhand Bharat Theory", united nations for Bharatiyas. Golwalkar was one of the early Hindu nationalist thinkers in India. Golwalkar authored the book We, or Our Nationhood Defined. Bunch of Thoughts is a compilation of his speeches. Early life Golwalkar was born to Sadashivrao and Lakshmibai Golwalkar in a Marathi Karhade Brahmin family at Ramtek, near Nagpur in Maharashtra. His family was prosperous and supported him in his studies and activities. Sadashivrao, a former clerk in the Posts and Telegraphs Department, became a teacher in the Central Provinces and Berar and ended his career as headmaster of a high school. Golwalkar was the only surviving son of nine children. Since his father was frequently transferred around the country, he attended a number of schools. Golwalkar studied science and was apt and apolitical as a student. As an adolescent, he developed a deep interest in religion and spiritual meditation. Golwalkar enrolled in Hislop College, a missionary-run educational institute in Nagpur. At the college, he was reportedly incensed at the "open advocacy" of Christianity and the disparagement of Hinduism; much of his concern for the defence of Hinduism is traceable to this experience. He left Hislop College for Benaras Hindu University (BHU) in Varanasi, receiving a Bachelor of Science degree in 1927, and a master's degree in biology in 1929. He was influenced by Madan Mohan Malaviya, a nationalist leader and founder of the university. Golwalkar went to Madras to pursue a doctorate in marine biology, but could not complete it because of his father's retirement; he later taught zoology for three years at BHU. His students called him "Guruji" because of his beard, long hair and simple robe, a practice later continued in a reverential manner by his RSS followers. Golwalkar returned to Nagpur, and obtained a law degree in 1937. While lecturing at Banaras Hindu University, Bhaiyaji Dani, a student and close associate of RSS Sarsanghchalak K. B. Hedgewar, founded an RSS shakha in Varanasi. Although Golwalkar attended meetings and was esteemed by