The Lost Cause is a set of beliefs, common in the white American South in the late 19th and early 20th centuries, that describes the Confederate cause as a heroic one against great odds despite its defeat. The beliefs endorse the virtues of the antebellum South, viewing the American Civil War as an honorable struggle for the Southern way of life, while minimizing or denying the central role of slavery. While it was not taught in the North, aspects of it did win acceptance there and helped the process of reunifying American whites.
Yale University history professor Rollin G. Osterweis summarizes the content that pervaded "Lost Cause" writings:
The Legend of the Lost Cause began as mostly a literary expression of the despair of a bitter, defeated people over a lost identity. It was a landscape dotted with figures drawn mainly out of the past: the chivalric planter; the magnolia-scented Southern belle; the good, gray Confederate veteran, once a knight of the field and saddle; and obliging old Uncle Remus. All these, while quickly enveloped in a golden haze, became very real to the people of the South, who found the symbols useful in the reconstituting of their shattered civilization. They perpetuated the ideals of the Old South and brought a sense of comfort to the New.
The Lost Cause belief system synthesized numerous ideas into a coherent package. The Lost Cause supporters did not claim that slavery was the main cause of the Civil War – few scholars did before the 1950s. Instead supporters stressed secession as a defense against a Northern threat to their way of life and said that threat violated the states' rights guaranteed by the Union. They believed any state had the right to secede, a point strongly denied by the North. The Lost Cause portrayed the South as more profoundly Christian than the greedy North. It portrayed the slavery system as more benevolent than cruel, emphasizing that it taught Christianity and civilization. In explaining Confederate defeat, the Lost Cause said the main factor was not qualitative inferiority in leadership or fighting ability but the massive quantitative superiority of the Yankee industrial machine.
Historians, including Gaines Foster, generally agree that the Lost Cause narrative also "helped preserve white supremacy". "Most scholars who have studied the white South's memory of the Civil War or the Old South conclude that both portrayed a past society in which whites were in charge and blacks faithful and subservient." Supporters typically portray the Confederacy's cause as noble and its leadership as exemplars of old-fashioned chivalry and honor, defeated by the Union armies through numerical and industrial force that overwhelmed the South's superior military skill and courage. Proponents of the Lost Cause movement also condemned the Reconstruction that followed the Civil War, claiming that it had been a deliberate attempt by Northern politicians and speculators to destroy the traditional Southern way of life. In recent decades Lost Cause themes have been widely promoted by the Neo-Confederate movement in books and op-eds, and especially in one of the movement's magazines, the Southern Partisan. The Lost Cause theme has been a major element in defining gender roles in the white South, in terms of honor, tradition, and family roles. The Lost Cause has inspired many prominent Southern memorials and even religious attitudes.