Why did the relationship between the USA and USSR change between 1975 and 1990

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Why did the relationship between the USA and USSR change between 1975 and 1990?

From 1975 to 1990 US Russian relations got better and worse as different leaders led the two nations. The relations changed due to events and stances brought on by the leaders of the Superpowers.

From the early 1970’s relations between the USA and Russia continued to get better and better. In 1970 the two superpowers began Strategic Arms Limitations Talks (SALT 1) to try and bring an end to the nuclear arms race; by 1972 the countries had signed the Anti-Ballistic Missile Treaty and the Interim Agreement which limited their production of certain nuclear arms. This was seen as a great step to towards the end of the cold war and proved that that USSR and USA were capable of working together. Following SALT 1 a new round of negotiations was needed as SALT 1 only covered a five year period; these talks were to be SALT 2.

In early 1975 American astronauts and Soviet Cosmonauts met up and shook hands in Space. This was quite literally the high point in detente, showing the world that the two nations were working together. In August 1975, 35 countries met in Helsinki and agreed that the frontiers of post 1945 Europe should be permanent.  The leaders also agreed to a declaration of human rights, all countries concerned would allow freedom of speech, religion, movement and freedom from unfair arrest. The US hoped this would mean more freedom for those under communist control. However, the Communists were becoming more and more confident due to Vietnam, Cambodia and Laos all turning communist so the USA was unsure as to what the Russians would do next.

The USSR had no intentions of keeping its promises made in Helsinki. In 1977 while the talks went on, began to secretly position new Soviet SS-20 medium range missiles in Europe; the US and Western European countries saw this as a threat. As retaliation Jimmy Carter, the newly elected US president, allowed more weapon development in the USA and publicly criticised the USSR’s failure to recognise human rights. NATO began placing what would end up being 500 Cruise and Perishing missiles in Western Europe as a deterrent to this threat of Soviet attack. The countries seemed to have taken a step back in trust as the arms race had started again, relations were rapidly worsening.

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SALT 2 had led to another agreement, signed in June 1979 between Carter and Brezhnev limiting the number of long range missiles the countries could produce. However the SALT 2 agreements were never ratified by congress as on Christmas Day in 1979 the USSR invaded Afghanistan to protect the pro soviet regime from Muslim opposition forces, the Mujahedeen. The USSR was maintaining the Brezhnev doctrine. The USA was already uneasy about its position in the Middle East due to the Pro Western ruler of Iran, the Shah, being replaced by an Islamic Republic. As the USA now had no influence ...

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