National Defense A strong USA defense brought down the Soviet Union. It was Ronald Reagan - first in a speech at Notre Dame University in May 1981, then his 'Evil Empire' speech of March 1983 - who most eloquently declared communism's imminent demise. Reagan was right. And even Soviet officials attribute Ronald Reagan's rhetoric and foreign policy to bringing down that 'evil empire.' By Christmas Day, 1990, the Soviet Union ceased to exist. Liberals wished it were other things.