The world war ii military action is significant how

The significance of military action in WWII is that without taking this necessary action, (assuming you are referring to the U.S.) WWII could have had a very different outcome. The U.S. involvement in WWII was the cause of the bombing of Pearl Harbor. If they hadn't formed the Allied Forces to defeat Germany and Hitler, Germany very well might have won.

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Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor