It started in the 1880's.
Both became militaristic and started expanding their empires. However, Japan never developed a totalitarian
The United States can be described as both indirectly democratic and "federal" since power remains at both the state and federal levels of government.
Answer: Reagan did not stop communism (communism never existed and its ideology is still here....there are many communist parties all over the world which is quite surprising and incredible) but practiced very well Kennan´s strategy of "containment". Communism itself underwent serious crises (1956 Hungary, 1968 Czechoslovakia, 80s in Poland) ...in 1980s there was a lot of dissatisfaction in the Eastern block, anti-communist opposition was growing and USSR became aware that reforms are necessary. Gorbatchev (from 1985) was really aware that the communist regimes are no longer sustainable. There were various factors.
Explanation: communist regimes exhausted themselves, nothing worked....economically and ideologically as well. That was something which helped very much to Reagan.