Regarding individualism, there was this movement called “The Transcendentalist” that served as a reaction against the rationalism of the 18th. This was followed by a humanitarian trend of the 19th century way of thinking. The movement was based on the belief in the unity of everything with God.
Specifically, the movement in Christian church known as the Great Awakening or the Revival attracted a lot people who found in religion a new way to see things.
That idea helped abolitionist supporters like David Walker and others to support anti-slavery in southern states. The church had a key role in spreading the anti-slavery sentiment across the nation that led to the Civil War.
Women’s Rights also was an important agent of change in American Culture. In 1821, Emma Hart Willard had the idea of founding the “Troy Female Seminary” in New York. The relevance of this decision is that it created the first endowed school for girls.
After that, many others institutions appeared like Oberlin College, which became the first coeducational college in the U.S.(1841).
In 1837, in New York, the first National Female Anti-Slavery Society convention gathers for the first time, marking an important step in women’s rights that had direct influence in the first women's rights convention in 1848, in Seneca Falls. The participants signed the "Declaration of Sentiments and Resolutions" that includes statements for the women's rights movement.