Madhavrao Sadashivrao Golwalkar, popularly known as Guruji was the second sarasanghachalak of the Rashtriya Swayamsevak Sangh, was born on 19 February 1906 at Ramtek near Nagpur, Maharashtra. He was the only surviving son among the nine children of his parents, to whom he was their beloved 'Madhu'. Madhav spent his childhood in Nagpur.

He completed Bachelor of Science and Master of Science in Zoology at Banaras Hindu University. Later he became teacher at BHU. Here students addressed him 'Guruji'. Later Guruji came in contact with Ramakrishna Order at Nagpur. On 13th January, 1937 Guruji was initiated into the Ramakrishna Order by Swami Swami Akhandananda, a direct disciple of Shri Ramakrishna Paramahamsa.

In 1940

He was the force behind formation of many Hindu organisations like VHP, student wing ABVP etc. Rashtriya Swayamsevak Sangh is celebrating 2006-07 as Guruji centenary year. His complete works are now available in different Indian languages and English.