The US followed isolationism after WW1 because the public didn't want to be apart of another war which concerned Europe, and a war looked inevitable.
The third statement reflects the similarities between Bill Gates and Andrew Carnegie. The third statement mentioned about the occupation of Gates and Carnegie and emphasizes how they excel on their respected fields. The third statement indicates the how they were the tycoons in their respected time.
The action by the state of Maryland which led to McCulloch v. Maryland was that it attempted to stop a branch of the Second Bank of the United States from bringing in notes that were not made in Maryland, as they were taxed if they were from out of state. This case led to the necessary and proper clause being used and is one of the most famous Supreme Court cases in the history of the United States.
This is true - Italy has a aging population which is expected to life long - as is the case with most post-industrial societies, while Niger on the other hand expects its people to live not as long and at the same time has a younger population.
