Israel has a parliamentary system of government, with no complete formal constitution. It is a Jewish and democratic state. Local government is relatively limited in power. The Israeli Supreme Court has developed a judicial bill of rights to ensure protection of human rights and the government offers National health care, giving all citizens the right to free medical care. The nation is divided into six administrative districts, with 14 subdistricts under the charge of district officers. Local self-governing is controlled by councillors, which are elected. The labor party led the government from independence through 1977, from where it collapsed after a series of complicated government issues. Major parties today include the Labor party, Natural Religious party, Orthodox Party, and United Arab List. Religion plays a large role in Israel's government, laws often favoring the majority of the population, the Jewish community. Imperial goals also has played a large role in decisions since the formation of Israel, concentrating on building a strong military to gain more Arab land to rule, while protecting against those who wish to revolt to restore original borders. Israel joined the United Nations shortly after its formation and continues to be active in global politics today.