The Second Great Awakening was a religious revival which caused many people to become religious or to change religions.
During the Second Great Awakening, there was a shift from Calvinism to other Protestant religions. Calvinism taught that only "the elect" were destined to go to heaven. However the growth of other Protestant religions popularized the belief of salvation for everyone.
During the Second Great Awakening people gathered in the camp meetings. During these meetings preachers taught people who then would go and spread the word to other villages.
Many revolutionary ideas arose thanks to Thomas Paine's book "The Age of Reason" in which he showed his point of view about God and science. In his argument, he claimed that certain phenomenons can be explained with science and reason.
The Second Great Awakening was a successful movement. It had a great impact on American religion and sparked other social reforms.