320px-Flag_of_Finland.svg1917 – The Russians have a revolution and Finland takes the opportunity to declare independence.

Well , the story is a bit more complicated than that. From Wikipedia:

From the 12th until the start of the 19th century, Finland was a part of Sweden. It then became an autonomous Grand Duchy within the Russian Empire until the Russian Revolution. This prompted the Finnish Declaration of Independence, which was followed by a civil war where the pro-Bolshevik “Reds” were defeated by the pro-conservative “Whites” with support from the German Empire. After a brief attempt to establish a monarchy in the country, Finland became a republic. Finland’s experience of World War II involved three separate conflicts: the Winter War (1939–1940) and Continuation War (1941–1944) against the Soviet Union and the Lapland War (1944–1945) against Nazi Germany. Following the end of the war, Finland joined the United Nations in 1955, the Organisation for Economic Co-operation and Development (OECD) in 1969, the European Union in 1995, and the eurozone at its inception in 1999. During this time, it built an extensive Nordic-style welfare state.

Finland was a relative latecomer to industrialisation, remaining a largely agrarian country until the 1950s. Thereafter, economic development was rapid, such that today, Finland has a nominal per-capita income of over $46,000 (2012).According to some measures,Finland has the best educational system in Europe and has recently been ranked as one of the world’s most peaceful and economically competitive countries. It has also been ranked as one of the world’s countries with the highest quality of life.