What term is used for someone who opposes social or political change?

The term "reactionary" refers to individuals or groups that oppose social or political change and seek to maintain or return to a previous state of affairs. They often resist reforms and advocate for the preservation of traditional values and established systems. This stance is typically driven by a belief that changes threaten their interests, values, or social order.

In contrast, a progressive is someone who advocates for reform and social change, pursuing advancements in society. A radical seeks significant and often abrupt change to address perceived injustices, often advocating for a complete overhaul of existing systems. A liberal typically supports individual freedoms, equality, and governmental reforms but does not necessarily oppose change; rather, they may advocate for gradual modernization.

In this context, the term "reactionary" is the most accurate descriptor for someone who opposes change outright, making it the correct choice.