Isolationism has been successful for some countries at certain times. For example, for centuries Japan's politics embraced a policy of isolation known as sakoku, which helped the country preserve its cultural identity and independence. Similarly, Switzerland's neutral stance has allowed the country to avoid most of the major conflicts that have embroiled Europe over the centuries.
Nevertheless, as a long-term strategy, isolationism has often been unsuccessful. Isolationist policies can prevent countries from fully participating in the global economy, and can also make them more vulnerable to attack by foreign powers. In addition, isolationism can lead to a sense of complacency, which can make countries less prepared for the challenges of a changing world.