An extreme conservative; an opponent of progress or liberalism WordNet 3.0 & Open English WordNet

In political science, a reactionary or a reactionist is a person who holds political views that favor a return to the status quo ante—the previous political state of society—which the person believes was better in some ways that are absent from contemporary society. Wikipedia

A political tendency Wikipedia Disambiguation

Describes a political view that favors previous political aspects or states over present ones Wikidata

A person or group with extremely conservative views. Wiktionary