Ok, there is a lot for McCarthy. Since he was a Senator, form the late 1940's to the mid 1950's he went on a hunt for communists in the gov and in public life. He mostly did this because he wanted to ensure his political success. So during this time was the "Red Scare" aka when Americans were afraid of communism, so when he claimed he had a list of 205 communists the public went crazy and supported his crusade.
The nations were all competing with imperialism. European powers were all fighting to get the African colonies.
Grenville's policies antagonized northern merchant, settlers in the northern back-country, southern planters, urban professionals, small farmers, workers in towns as his policies led to people being mad and turning hostile about being taxed heavily.
George Grenvillea was English politician whose policy of taxing the American colonies, initiated by his Sugar Act of 1764 and the Stamp Act of 1765, started the train of events leading to the American Revolution.