Answer:
The Iron Curtain was a problem because it divided Europe in an ideological, political and even geographical way.
Step-by-step explanation:
The Iron Curtain designated the political and territorial barrier that isolated the USSR and other socialist countries from the capitalist countries of the West during the Cold War.
The term was introduced by Winston Churchill on March 5, 1946, when he described the divide that ran from the Baltic to Trieste. The term was already used by the Russian writer Vasily Vasilyevich Rozanov in 1918 to describe the isolation of the Soviet Union from the rest of Europe.
The iron curtain began to crumble by the end of the 1980s due to a policy of openness in the USSR and Eastern European countries. The symbol of the fall of the Iron Curtain was the destruction of the Berlin Wall.