What were the main strengths of the Soviet Union? What were the main weaknesses? Who exposed these weaknesses and to whom did he expose them? Was it economics or politics that led to the downfall of the USSR? Explain.

What were the main strengths of the Soviet Union? What were the main weaknesses? Who exposed these weaknesses and to whom did he expose them? Was it economics or politics that led to the downfall of the USSR? Explain.