Finlandization (suomettuminen; finlandisering; Finnlandisierung; soometumine; финляндизация, finlyandizatsiya) is the process by which one powerful country makes a smaller neighboring country refrain from opposing the former's foreign policy rules, while allowing it to keep its nominal independence and its own political system. The term means "to become like Finland", referring to the influence of the Soviet Union on Finland's policies during the Cold War.
The term is often considered pejorative. It originated in the West German political debate of the late 1960s and 1970s. As the term was used in West Germany and other NATO countries, it referred to the decision of a country not to challenge a more powerful neighbour in foreign politics, while maintaining national sovereignty. It is commonly used in reference to Finland's policies in relation to the Soviet Union during the Cold War, but it can refer more generally to similar international relations, such as Denmark's attitude toward Germany between 1871 and 1940, or the policies of the Swiss government towards Nazi Germany until the end of World War II.
In Germany, the term was used mainly by proponents of closer adaptation to US policies, chiefly Franz Josef Strauss, but was initially coined in scholarly debate, and made known by the German political scientists Richard Löwenthal, Walter Hallstein and Kurt Birrenbach, reflecting feared effects of withdrawal of US troops from Germany. It came to be used in the debate of the NATO countries in response to Willy Brandt's attempts to normalise relations with East Germany, and the following widespread scepticism in Germany against NATO's Dual-Track Decision. Later, after the fall of the Soviet Union, the term has been used in Finland for the post-1968 radicalisation in the latter half of the Urho Kekkonen era.
In the 1990s, Finlandization was also discussed as a potential strategy that the Soviet Union under Gorbachev may have attempted to revise its relationship with the Warsaw Pact states from 1989 to 1991, as a way to transition from informal empire to a looser sphere of influence model, which was precluded by the fall of the USSR.