After growing up in Georgia, Stalin became a political activist, conducting discreet activities for the Bolshevik Party for twelve years before the Russian Revolution in 1917. ... Following the October Revolution, Stalin took military positions in the Russian Civil War and the Polish-Soviet War.
He was talking about the political divide between Western and eastern europe. Eastern europe was mostly communist. Whereas, western europe was made up of democratic countries.
When the Japanese empire was dismantled at the end of World War Two, Korea fell victim to the Cold War. It was divided into two spheres of influence along the 38th parallel. The Americans controlled south of the line - the Russians installed a communist regime in the north, later ceding influence to China.
Prejudice. Many people in the south supported slavery, therefore they were prejudiced against blacks. This led to a lack of education, basic rights, health facilities, jobs, etc.