a) Vaikunda Swamikal: He realized the ‘hollowness of caste system’ and installed a mirror in the temple to enlighten the people the oneness of the godliness. 

b) Chattambi Swamikal: He opposed the caste system and propagated the vision of ‘Adwaida’ means oneness of godliness. Swamikal was known as ‘Sarva Vidyarthi raja’ 

c) Sree Narayana Guru: Sree Narayana Guru is the symbol of love and humanity. He stood strongly against the priesthood of Brahmins, their nobility and the caste system and propagated equality and humanity of man. He exhorted the people to be strong by unity and to awaken by knowledge. 

d) Ayyankali: Ayyankali played a prominent role to instill self confidence and sense of unity among them. He spoke for the right to enter government schools. He organized and prepared the agricultural laborers to struggle for their rights who were subjected to all kinds of exploitation. 

e) Vakkom Abdul Khadar Moulavi: The leader among Muslims who propagated modern education among Muslims. He took initiative to eliminate the evils of religious customs. 

f) V.T. Bhattathirippad: He was a nobleman of modem thought. He raised his voice against evil customs in Namboodiri community and worked for the freedom of women. 

g) Sahodaran Ayyappan: He tried to prove that polytheism was irrational and fought against alcoholism and exploitation of peasants and for this started interdining. All these leaders were trying to reform the society.