The term Great Awakening is used to refer to several periods of religious revival in American religious history. Historians and theologians identify three or four waves of increased religious enthusiasm occurring between the early 18th century and the late 19th 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.
First Great Awakening
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' grandfather. Edwards' congregation was involved in a revival later called the "Frontier Revivals" in the mid-1730s. Ministers from various evangelical Protestant denominations supported the Great Awakening. 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. The leaders of the Great Awakening, such as Jonathan Edwards, Gilbert Tennent and George Whitefield, had little interest in merely engaging parishioners' intellects; rather, they sought a strong emotional response from their congregations that might yield the workings and experiential evidence of saving grace.
Joseph Tracy, the minister, historian, and preacher who gave this religious phenomenon its name in his influential 1842 book The Great Awakening, saw the First Great Awakening as a precursor to the American Revolution. The evangelical movement of the 1740s played a key role in the development of democratic thought, as well as the belief of the free press and the belief that information should be shared and completely unbiased and uncontrolled. These concepts ushered in the period of the American Revolution. This contributed to create a demand for religious freedom. Although the Great Awakening represented the first time African Americans embraced Christianity in large numbers, Anglican missionaries had long sought to convert blacks, again with the printed as well as the spoken word. 
Second Great Awakening
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.
In addition to a religious movement, other reform movements such as temperance, abolition, and women's rights also grew in antebellum America. 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.
Third Great Awakening
The Third Great Awakening in 1850s-1900s was characterized by new denominations, very active missionary work, and the Social Gospel approach to social issues. The effects of such an awakening are immeasurable. It resulted in the addition of approximately one million converts to the churches of the United States. It tied the gospel with social work in a manner that had not been seen in this country before. It prepared the nation for the blood bath it would soon experience in the war years of 1861-1865. It gave birth to the great revivals which swept the armies of the South during the days of the war. Out of the 1858 Awakening came the introduction of the Y.M.C.A. into American cities. It produced the leadership, such as that of Dwight L. Moody, out of which came the religious work carried on in the armies during the civil war. It gave impetus to the creation of the Christian and Sanitary Commissions and numerous Freedmen's Societies that were formed in the midst of the War.
Fourth Great Awakening
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. Others call this time the Charismatic Movement. At that time the "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. Most of these organizations still stand today.
There is no consensus on whether a fourth awakening has actually taken place.
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 US history has been put forth by conservative US evangelicals.
- Ahlstrom, Sydney E. A Religious History of the American People (1972) the standard history
- Butler, Jon. "Enthusiasm Described and Decried: The Great Awakening as Interpretative Fiction." Journal of American History 69 (1982): 305-25. in JSTOR, influential article
- Butler, Jon. Awash in a Sea of Faith: Christianizing the American People. (1990). excerpt and text search
- Hatch, Nathan O. The Democratization of American Christianity (1989). excerpt and text search
- Heimert, Alan. Religion and the American Mind: From the Great Awakening to the Revolution (1966) online in ACLS e-books
- Lambert, Frank. Inventing the Great Awakening Princeton: Princeton University Press, 1999.
- Kelleter, Frank. Amerikanische Aufklärung: Sprachen der Rationalität im Zeitalter der Revolution (2002)
- Kidd, Thomas S. The Great Awakening: The Roots of Evangelical Christianity in Colonial America (2007), 412pp excerpt and text search
- Lambert, Frank. Pedlar in Divinity: George Whitefield and the Transatlantic Revivals; Princeton: Princeton University Press, 1994
- William G. McLoughlin; Revivals, Awakenings and Reform: An Essay on Religion and Social Change in America, 1607-1977 (1978)
- Najar, Monica. Evangelizing the South: A Social History of Church and State in Early America. (2008). 252 pp.
- Tracy, Joseph. The Great Awakening: A History of the Revival of Religion in the Time of Edwards and Whitefield, 1997, Banner of Truth, ISBN 0-85151-712-9. This is a reprint of the original work published in 1842.
- Stout, Harry. The Divine Dramatist: George Whitefield and the Rise of Modern Evangelicalism;Grand Rapids, William B. Eerdmans, 1991
- For the influence of the Great Awakening on Eighteenth-century Canada see Henry Alline.
- Alan Heimert and Perry Miller ed.; The Great Awakening: Documents Illustrating the Crisis and Its Consequences; New York: Bobbs-Merrill, 1967
- Collection of Resources: Biographies, Essays, Sermon Texts, etc.