The Russian Revolution was caused by a variety of factors, including an unfair and undemocratic government, bad working and living conditions for much of the population, political, social, and economic discontent among the people, and the strain of World War I on the weak government and economy of Russia. Along with this, there was criticism of Tsarist policies by provincial Zemstvas, nationalism among Russia's population, and threats to the monarchy from the middle class. This led to a growing sense of discontent and frustration among the Russian people, ultimately culminating in a successful revolution in 1917 in which the former monarchy was overthrown and a socialist government was established.