After the fall of Rome, Europe entered a period of disorder and decline known as the Dark Ages. During this time, feudalism emerged as wealthy lords divided land among vassals in exchange for military service, and peasants worked as serfs in harsh conditions. The powerful Catholic Church dominated all aspects of life. By the High Middle Ages, trade revived and a middle class emerged, undermining feudalism. However, the Black Death plague in 1347 killed around 1/3 of Europeans and disrupted society, increasing questioning of the Church.