The Russian Social Democratic Labour Party (RSDLP) was a political party founded in 1898 that aimed to promote socialism in Russia. It played a significant role in the early 20th century, advocating for workers' rights and social reforms. The party was divided into factions, the most notable being the Bolsheviks, led by Vladimir Lenin, and the Mensheviks, who had differing views on how to achieve socialist goals. The RSDLP was instrumental in the events leading up to the Russian Revolution of 1917. After the revolution, the Bolsheviks emerged as the dominant faction, eventually leading to the establishment of the Soviet Union. The party's legacy continues to influence socialist movements in Russia and beyond.