retrogress

As you might guess, retrogress is the opposite of progress. Retrogression is usually an undesirable decline from a higher or advanced level. So, for instance, in difficult social situations an adolescent can retrogress to a childish level of maturity. And under the extreme conditions of total war, a whole society may retrogress to a primitive state. The increasing number of poor or homeless people has been seen as evidence of modern social retrogression, and the rise of loud, name-calling TV and radio personalities strikes many people as a sign of political retrogression.