Breaking loose from European models, the Americans developed their own high culture, notably in literature and in higher education. The Second Great Awakening brought revivals across the country, forming new denominations and greatly increasing church membership, especially among Methodists and Baptists. By the 1840s increasing numbers of immigrants were arriving from Europe, especially British, Irish, and Germans. Many settled in the cities, which were starting to emerge as a major factor in the economy and society. The Whigs had warned that annexation of Texas would lead to a crisis over slavery, and they were proven right by the turmoil of the 1850s that led to the Civil War.