Which movement, often associated with the age of reason, spread the idea that reason and science could improve society?

• A. Industrialization
• B. Bill of Rights
• C. Northwest Ordinance
• D. Enlightenment

Answer: (D)

The idea that reason and science could improve society is the hallmark of the Enlightenment. This 17th–18th century movement stressed rational thought, empirical study, and questioning traditional authority, with thinkers like Voltaire, Montesquieu, and Rousseau arguing that human progress comes from applying reason to politics, law, education, and social life. In the American context, Enlightenment thinking helped shape beliefs in natural rights, the social contract, and the structure of government designed to protect liberty and promote the common good. The other options describe concrete events or legal documents rather than a broad intellectual movement focused on using reason and science to better society, so they don’t fit as well.