What are some advantages of isolationism

1. You don't get tangled up in some bloody war. 
2. You don't have to spend a lot of money on other countries problems. 
3. As a government you can focus more on the needs of your countrymen. 
4. You don't have to keep a large military on hair trigger notice. 
5. You're not likely to make enemies out of some random country halfway around the world. 

nonparticipation in any alliances, economic commitments or foreign trade, to avoid diplomacy entanglements with foreign countries