Mohandas Gandhi pioneered the art of "Satyagraha", typified with a strict adherence to ahimsa (non-violence), and civil disobedience. This permitted common individuals to engage the British in revolution, without employing violence or other distasteful means. Gandhi's equally strict adherence to democracy, religious and ethnic equality and brotherhood, as well as activist rejection of caste-based discrimination and untouchability united people across these demographic lines for the first time in India's history. The masses participated in India's independence struggle for the first time, and the membership of the Congress grew over tens of millions by the 1930s. In addition, Gandhi's victories in the Champaran and Kheda Satyagraha in 1918–19, gave confidence to a rising younger generation of Indian nationalists that India could gain independence from British rule. National leaders like Sardar Vallabhbhai Patel, Jawaharlal Nehru, Maulana Azad, Chakravarti Rajagopalachari, Mohandas Gandhi, Rajendra Prasad and Badshah Khan brought together generations of Indians across regions and demographics, and provided a strong leadership base giving the country political direction.