Ek Saran Naam Dharma -is created by Sankardeva. Vaishnavite movement was spread all over India🇮🇳. In 15th century, Sankardeva went for his pilgrimage two times. First,he went for 12years and collected and observed the knowledge of Vaishnavism from different parts of India. and created Ek saran naam dharma, where Lord Vishnu is worshipped by Naam Kirtana.He tried to abolish the practice of animal sacrifice through this dharma. Any one can take this religion.
the main motive of Sankardeva to spread this religions was to unite people in one fold bhakti and to remove the caste system.