It is a form of advertisement usually done by the government or a political party. 

This phrase means the war was so horrible that no one could go

Militarism- the belief that a country should have a strong military. 
Nationalism- pride in your country and the willingness to stand up for your nation to an extreme. 
War becomes more likely. 

What Hitler did.

Nationalism is patriotic feeling, principles, or efforts. It is a good thing unless it fuels or is used against 

He organized the berlin conference, he unified germany. 

I think it represents england reaching out and taking control of everywhere around it. i think this sheds a negative 

The industrial revolution has both harmful and bene

I think she is trying to say before the industrial revolution most people worked on farms and the children were cared for by multiple adults. I think she is speaking negatively about the industrial revolution. 

One positive aspect of capitalism is free enterprise. A negative aspect is the very rich stay rich and the very poor stay poor.