Final answer:
Reform movements in history advocate for limited yet meaningful changes within existing systems, such as the abolitionist movement and civil rights movement in the United States.
Explanation:
Reform movements in history have sought to bring about limited but significant changes within existing political, economic, or social systems, distinct from radical movements that aim for fundamental value system changes. Some notable U.S. reform movements include the abolitionist movement, women's suffrage movement, civil rights movement, labor movement, antiwar movements, contemporary women's movement, gay rights movement, and environmental movement.
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