Pls explain the Russia. Revolution

The Russian Revolution of 1917 was one of the most explosive political events of the twentieth century. The violent revolution marked the end of the Romanov dynasty and centuries of Russian Imperial rule. During the Russian Revolution, the Bolsheviks, led by leftist revolutionary Vladimir Lenin, seized power and destroyed the tradition of csarist rule. The Bolsheviks would later become the Communist Party of the Soviet Union.In 1917, two revolutions swept through Russia, ending centuries of imperial rule and setting into motion political and social changes that would lead to the formation of the?Soviet Union. While the two revolutionary events took place within a few short months, social unrest in Russia had been simmering for decades.Russia industrialized much later than Western Europe and the United States. When it finally did, around the turn of the 20th century, it brought with it immense social and political changes.
Between 1890 and 1910, for example, the population of major Russian cities such as St. Petersburg and Moscow nearly doubled, resulting in overcrowding and destitute living conditions for a new class of Russian industrial workers.