After the Russian Revolution of 1917, Abkhazia was a part of the Democratic Republic of Georgia, but was conquered by the Red Army in 1921 and eventually entered the Soviet Union as a Soviet Socialist Republic associated with the Georgian SSR. The status of Abkhazia was downgraded in 1931 when it became an Autonomous SSR within the Georgian SSR. Under Joseph Stalin, a forcible collectivization was introduced and the native communist elite purged. The influx of Armenians, Russians and Georgians into the growing agricultural and tourism sectors was also encouraged, and Abkhaz schools were briefly closed. By 1989, the number of Abkhaz was about 93,000 (18% of the population of the autonomous republic), while the Georgian population numbered 240,000 (45%). The number of Armenians (15% of the entire population) and Russians (14%) grew substantially as well.