Ministers and several ministers in charge of particular activities. The executive branch is responsible for the implementation of political, economic, cultural, social, national defence, security and external activities of the state. Vietnam has a judicial system governed by the Constitution of Vietnam and national legislation enacted by National Assembly. The Supreme People's Court () is the highest court of appeal in Vietnam. There are other specialised courts in Vietnam, including the Central Military Court, the Criminal Court, the Civil Court and the Appeal Court. The Supreme People's Procuracy observes the implementation of state organs and makes sure that Vietnamese citizens follow the law. Legal framework Vietnam is a one-party socialist republic. The current Vietnamese state traces its direct lineage back to the Democratic Republic of Vietnam (North Vietnam) and the 1945 August Revolution led by Hồ Chí Minh. The current constitution was adopted on 28 November 2013 by the National Assembly of Vietnam. There have been four other constitutions in Vietnamese history: the 1946, 1959, 1980, and 1992 constitutions. The Communist Party of Vietnam, the leading non-State organ, operates in accordance with the laws. Government powers in Vietnam are divided into legislative, executive and judiciary powers. Vietnam's legal system is based upon socialist legality according to Article 12 of the constitution. State ideology Vietnam is a socialist republic with a one-party system led by the Communist Party of Vietnam (CPV). The CPV espouses Marxism–Leninism and Hồ Chí Minh Thought, the political philosophy and ideology of the late Hồ Chí Minh. The two ideologies function as a firm ideological basis and serve as guidance for the activities of the Party and state. According to the Constitution, Vietnam is "in the period of transition to socialism". Marxism–Leninism was introduced to Vietnam in the 1920s and 1930s, and Vietnamese culture has been led under the banner of patriotism and Marxism–Leninism. Hồ Chí Minh's beliefs were not systematised during his life, nor quickly following his death. Trường Chinh's biography of "Chairman Hồ" in 1973 emphasised his revolutionary policies. The thoughts of Hồ Chí Minh were systematised in 1989, under the leadership of Nguyễn Văn Linh. Hồ Chí Minh Thought, alongside Marxism–Leninism, became the official ideology of the CPV and the state in 1991. The CPV's claim to legitimacy was retained following the collapse of communism in 1989 and the dissolution of the Soviet Union in 1991 by its commitment to the thoughts of Hồ