From Wikipedia's article on "Reactionary"
In the 19th century, reactionary denoted people who idealized feudalism and the pre-modern era—before the Industrial Revolution and the French Revolution—when economies were mostly agrarian, a landed aristocracy dominated society, a hereditary king ruled, and the Catholic Church was society's moral center. Those labeled "reactionary" favored the aristocracy instead of the middle and working classes. Reactionaries opposed democracy and parliamentarism.