Political parties may also temporarily cease to exist in countries that have either only been established recently, or have experienced a major upheaval in their politics and have not yet returned to a stable system of political parties. For example, the United States began as a non-partisan democracy, and it evolved a stable system of political parties over the course of many decades. A country's party system may also dissolve and take time to re-form, leaving a period of minimal or no party system, such as in Peru following the regime of Alberto Fujimori. However, it is also possible (though rare) for countries with no bans on political parties, and which have not experienced a major disruption, to nevertheless have no political parties: there are a small number of pacific island democracies, such as Palau, where political parties are permitted to exist and yet parties are not an important part of national politics.