Although Switzerland is a much larger and more politically important country, it has retained neutrality much longer than Ireland. This state has not been mixed up in political conflicts since 1815. The country is surrounded by mountains, which further hinders an attack.
Slovenia seems to stay away from all conflicts and has not been heavily involved in any of the previous wars. It is also extremely self-sufficient, especially when it comes to energy production, hence the conclusion that it can survive even the greatest war.
Fiji is a quiet land, an island in the middle of the Pacific Ocean. It is isolated from other countries geographically. It is a tropical paradise, not involved in political wars with wonderful weather and amazing people.