The Great Awakening is a term that refers to a number of periods of religious revival in American Christian history. Historians and theologians identify three or four waves of increased religious enthusiasm occurring between the early 18th century and the late 20th century. Each of these "Great Awakenings" was characterized by widespread revivals led by evangelical Protestant ministers, a sharp increase of interest in religion, a profound sense of conviction and redemption on the part of those affected, an increase in evangelical church membership, and the formation of new religious movements and denominations.
The Awakenings all resulted from powerful preaching that gave listeners a sense of personal guilt and of their need of salvation by Christ. Some of the influential people during the Great Awakening were George Whitefield, Jonathan Edwards, and Gilbert Tennent, and some of the influential groups during the Great Awakening were the New Lights and the Old Lights.  Pulling away from ritual and ceremony, the Great Awakening made religion intensely personal to the average person by fostering a deep sense of spiritual guilt and redemption, and by encouraging introspection and a commitment to a new standard of personal morality. It brought Christianity to African-American slaves and was an apocalyptic event in New England that challenged established authority. It incited rancor and division between old traditionalists who insisted on the continuing importance of ritual and doctrine, and the new revivalists, who encouraged emotional involvement and personal commitment. It had a major impact in reshaping the Congregational church, the Presbyterian church, the Dutch Reformed Church, and the German Reformed denomination, and strengthened the small Baptist and Methodist denominations. It had little impact on Anglicans and Quakers. Unlike the Second Great Awakening, which began about 1800 and reached out to the unchurched, the First Great Awakening focused on people who were already church members. It changed their rituals, their piety, and their self-awareness.
The First Great Awakening began in the 1730s and lasted to about 1743, though pockets of revivalism had occurred in years prior, especially amongst the ministry of Solomon Stoddard, Jonathan Edwards's grandfather. Edwards's congregation was involved in a revival later called the "Frontier Revivals" in the mid-1730s, though this was on the wane by 1737. But as American religious historian Sydney E. Ahlstrom noted, the Great Awakening "was still to come, ushered in by the Grand Itinerant", the British evangelist George Whitefield. Whitefield arrived in Georgia in 1738, and returned in 1739 for a second visit of the Colonies, making a "triumphant campaign north from Philadelphia to New York, and back to the South." In 1740, he visited New England, and "at every place he visited, the consequences were large and tumultuous." Ministers from various evangelical Protestant denominations supported the Great Awakening. In the middle colonies, he influenced not only the British churches, but the Dutch and Germans.
Additionally, pastoral styles began to change. In the late colonial period, most pastors read their sermons, which were theologically dense and advanced a particular theological argument or interpretation. Nathan O. Hatch argues that the evangelical movement of the 1740s played a key role in the development of democratic thought,[disputed ] as well as the belief of the free press and the belief that information should be shared and completely unbiased and uncontrolled. Micha? Choi?ski argues that the First Great Awakening marks the birth of the American "rhetoric of the revival" understood as "a particular mode of preaching in which the speaker employs a wide array of patterns and communicative strategies to initiate religious conversions and spiritual regeneration among the hearers". All these theological, social, and rhetorical notions ushered in the period of the American Revolution. This contributed to create a demand for religious freedom. The Great Awakening represented the first time African Americans embraced Christianity in large numbers.
In the later part of the 1700s the Revival came to the English colonies of Nova Scotia, New Brunswick, and Prince Edward Island, primarily through the efforts of Henry Alline and his New Light movement.
The Second Great Awakening was a religious revival that occurred in the United States beginning in the late eighteenth century and lasting until the middle of the nineteenth century. While it occurred in all parts of the United States, it was especially strong in the Northeast and the Midwest. This awakening was unique in that it moved beyond the educated elite of New England to those who were less wealthy and less educated. The center of revivalism was the so-called Burned-over district in western New York. Named for its overabundance of hellfire-and-damnation preaching, the region produced dozens of new denominations, communal societies, and reform.
Closely related to the Second Great Awakening were other reform movements such as temperance, abolition, and women's rights. The temperance movement encouraged people to abstain from consuming alcoholic drinks in order to preserve family order. The abolition movement fought to abolish slavery in the United States. The women's rights movement grew from female abolitionists who realized that they too could fight for their own political rights. In addition to these causes, reforms touched nearly every aspect of daily life, such as restricting the use of tobacco and dietary and dress reforms. The abolition movement emerged in the North from the wider Second Great Awakening 1800-1840.
The Third Great Awakening in the 1850s-1900s was characterized by new denominations, active missionary work, Chautauquas, and the Social Gospel approach to social issues. The YMCA (founded in 1844) played a major role in fostering revivals in the cities in the 1858 Awakening and after. The revival of 1858 produced the leadership, such as that of Dwight L. Moody, out of which came religious work carried on in the armies during the civil war. The Christian and Sanitary Commissions and numerous Freedmen's Societies were also formed in the midst of the War.
The Fourth Great Awakening is a debated concept that has not received the acceptance of the first three. Advocates such as economist Robert Fogel say it happened in the late 1960s and early 1970s.
Mainline Protestant denominations weakened sharply in both membership and influence while the most conservative religious denominations (such as the Southern Baptists and Missouri Synod Lutherans) grew rapidly in numbers, spread across the United States, had grave internal theological battles and schisms, and became politically powerful.
The idea of an "awakening" implies a slumber or passivity during secular or less religious times. Awakening is a term which originates from and is embraced often and primarily by evangelical Christians. In recent times, the idea of "awakenings" in United States history has been put forth by conservative American evangelicals.