Why did the us elect to contain communism after wwii

Which of the following is not true of american cowboys?

Why was galileo galilei brought before the inquisition? for insisting that earth stands still at the center of the universe for proving that planets move in elliptical orbits for putting forth evidence that earth moves around the sun for suggesting that the sun is a star

What was the final spark that ignited the “european powder keg” and started world war 1