The answer to this question can be quite subjective. Some people will say that the telephone is the most important invention, or the automobile, or the plane, but for me personally, I'd choose antibiotics.
It is a modern-day invention (as opposed to the Middle Ages, for example) which changed our lives for the better. Before penicillin was discovered in the 1920s by Alexander Fleming, people were constantly dying because of most harmless diseases. But after antibiotics were invented, people were given a chance to recover from their illnesses much more easily.
<span>The red scare that lay the ground for
</span><span>mccarthyism </span><span> was sparked off by numerous success stories of the communist forces.
The success of communism forces in china, and the increased mentions of soviet nuclear bombs and the discovery of several agents from USSR in the USA territory led to red scare that reached its peak with the sputnik news.
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Answer:
the second hundred years war
