Mahapragya played an instrumental role in the Anuvrat movement launched 2 March 1949 by his guru and then head of Jain Shwetambra Terapanth, Acharya Tulsi. The ultimate aim of the movement was and remains to create a nonviolent socio-political world order with the help of a worldwide network of self-transformed people. Since its inception it has inspired millions of people to practice purity and self-discipline in personal life. Mahapragya helped Acharya Tulsi in the preparation of the contents of Anuvrat and worked as a core member in the movement, many times playing the role of Acharya Tulsi's representative in explaining the principles of Anuvrat to society.
Acharya Shri Tulsi nominated Muni Nathmal as the Secretary (Nikaya Sachiv) of Terapanth in 1965 at Hissar Harayana after being Group leader (Agraganya) for almost 21 years.