23% done with The Russian Peasantry 1600-1930: The World the Peasants Made

The way the tsar kept power was: A) Tsar owns all the land B) Tsar granted land to nobles in exchange for military service C) Tsar tightened the rights of peasants because labor was scarce and land is useless if it’s not worked D) Nobles were able to make money and collected money and labor from the serfs.

Peasants became serfs as their rights were eroded to enable the land grant process to nobles.