The churchill speech was considered important because the speech was given when there was critical time in the history of the world.
Churchill speeches were being met with criticism which was from public of Britain and in the United States it was received in a better way.
Churchill believed that a speech can be powerful if vivid pictures and sound waves which bring about rapid succession.
Some of his speeches he said that he will fight on beaches, never despair. He told his people never despair despite what comes on their way.
A program instituted by the Soviet Union to restructure soviet economic and political policy
Most of Europe's population was killed during the time periods 1347 - 1350 with 30% to 65% of its population dead. The religions had like a downfall. Which all had a great impact on European history. I hope this helps! <3