The imaginary line of secrecy and mistrust is called the iron curtain.
The alliances system meant that a local conflict could easily result into an intimidating global one. The overall cause of World War was the assassination of Archduke Franz Ferdinand. Nationalism was a great cause of World War one because of countries being greedy and not negotiating.
Your welcome I don't know if that helped. But yea.
The answer is D.
Locke Defended the claim that men are by nature free and equal against claims that God had made all people naturally subject to a monarch. Lock says that people have rights, such as the rate of life, liberty, and property that I have a foundation independent of the laws of any particular society. He also said that men are naturally free and equal as part of the justification for understanding legitimate political government as the result of a social contract or people in the state of nature conditionally transfer some of the rights to the government in order to better ensure the stable, comfortable enjoyment of their lives, liberty, and property.