The arms race between the united states and the soviet union began when

The arm race began when the Soviet developed the atomic bomb.

Explanation:

As World War II ended, the dispute began when the Soviet Union famously tested its first atomic bomb in 1946. The achievement of a nuclear explosion horrified the world. Thus, the arms race began between the Soviet and the United States, known as the Cold War. The conflict between communist and democratic countries started, which lasted for several years.                                                          

explanation: we can only guess at how our actions may be perceived in the future. doing something really big like killing lots of people, saving lots of people, affecting the lives of lots of people is a sure fire way of being remembered in historical records. we can also make a difference in the history records by being a small influence on something bigger, whether that is as a civil servant, scientist or artist.

of course you could argue that we all affect history just as tiny cogs in a   bigger machine.

if you mean how do people influence our opinions of things which have already happened, then simply by writing a book which looks at things form a different perspective and trying to convince people that this perspective is more accurate or truthful. people do it all the time i.e. richard the third was a terrible or was he? plenty would disagree, it's just that their views aren't the most widely known.n:

what class is this for i can then