What effect did the black death have on the institution of feudalism?

Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?

What was one of the difficulties adams faced as president? a. european countries were trying to move back in on u.s. lands b. possible war with england; fighting between political parties c. problems with spain; trade disputes with russia d. census issues; problems with selecting a new capital

The factory system of the early-19th century caused a) a decrease in farm production. b) an increase in rural population. c) an increase in urban population. d) high unemployment in other areas.