" Distance from the troubled past is the product of economic and social change more than reflection or the mere passage of time, which may have little effect. To the extent that the basic circumstances of life remain unchanged, time becomes irrelevant; in fact, it may even deepen the hold of former attitudes, turning them into ancient truths. But as the foundations of social reality alter and the circumstances of daily life take on a new character, society can more easily accept hard truths and discard old controversies. It gains an ability to leave its past in the past and move into a different future.

[...] The desire of a few individuals to “overcome the past,” to rise above enmity and engage a different future after a destructive war, is laudable but rarely is achievable for an entire society. Substantial numbers of people will defend old positions or insist on the validity of their grievances, and the next generation may revive propaganda or condemn efforts to “forget.” Eventually, however, the world moves on, and changed realities allow acceptance of bitter truths about a troubled past. As progressively greater numbers acknowledge the past, historical wounds close, even those of bloody civil war [192—93]. "

― , Uncommonly Savage: Civil War and Remembrance in Spain and the United States