Reactionary

A reactionary or reactionist is a person or organization that is against social progress and wants society to return to the old way of doing things.

The word reactionary comes from the word "reaction," which describes movement in the opposite direction. In this case, reactionary beliefs and actions are opposed to the direction of social progress.

Some parts of right-wing politics is based on reactionary thinking and a wish to return to the way things were.

The words counter-revolutionary or anti-revolutionary are sometimes used instead of the word reactionary.