Switzerland remained neutral through both world wars.
Spain, Turkey, and Sweden
Switzerland remained neutral.
No, she did not take part in World War 1.She somehow took part in World War II during 'Spanish Civil war'.
Belgium
I am not sure, but I think it was Switzerland.
Russia, or rather, the Union of Soviet Socialist Republics; the Soviet Union. Every nation in Europe was devastated during World War II, with the exception of Switzerland, which remained neutral.
Yes. Although that nation may try to get involved and fight for their opinion about the conflict. Sometimes,when,involved,they choose a side. Otherwise,sure, - they can stay quiet.
There were several countries that did not participate in World War I. The primary neutral countries during World War I were Argentina, Chile, The Netherlands, Spain, Denmark, Norway, Venezuela, Sweden, Belgium, and Switzerland.
During World War I, the notable neutral nations were Spain, Sweden, Norway, Switzerland and the Netherlands.
As to not make anyone mad and to get things from everyone.
During World War I, Switzerland, Spain, and the Scandinavian nations remained totally neutral.