The speech delivered by Winston Churchill, when he used for the first time the expression "iron curtain" clearly established a border and an attitude of confrontation between the two blocs that have aroused in the European continent after WWII. On the Eastern side, the Soviet Union together with the states under its communist sphere and, on the other sid,e the Western powers that had won the war (France and UK) that were allies of the United States together with all the Western countries under their capitalist influence.
These were the two blocs that would be subsequently confronted during the Cold War.
The basis of Jean Calvin's teachings was the doctrine of predestination. He also believed in the omnipotence of the grace of God, which alone can save man.
He denied some of the rites practiced in the Catholic Church, approved the marriage of clergy, and worshiped in the vernacular, relative to the official Church that had held Latin-worshiping for centuries - an incomprehensible common people.