A head of state is the chief public representative of a nation-state, federation or commonwealth, whose role generally includes personifying the continuity and legitimacy of the state and exercising powers, functions and duties granted to the head of state in the country's constitution. In Charles de Gaulle's words, describing the role he envisaged for the French president when he wrote the modern French constitution, a head of state should embody "the spirit of the nation" to the nation itself and to the world: une certaine idée de la France.
In a monarchy, the monarch is the head of state. In a republic, the head of state is usually called the president, although some leaders have assumed other titles (some have simply used 'Head of State' as their only formal title).
In some countries the head of state is also the active head of government. These countries include absolute monarchies, other dictatorships and the so-called presidential systems particular prevalent in the Americas. The term "presidential system" in this sense can be misleading, since most countries with a president also maintain the separate office of prime minister as head of government.
In parliamentary systems the head of state may be merely the nominal chief executive officer of the state, while in reality powers are usually exercised by a cabinet, presided over by a prime minister who is answerable to parliament. However, exceptions exist even to this; for instance, in some times of exceptional crisis during the 20th century (typically German invasions), the then King of the Belgians has exercised his role as chief executive officer directly; this shows that such a direct capacity had and may still have a latent existence there, and so possibly elsewhere as well. Most recently, Liechtenstein gave its Prince unprecedented constitutional powers in 2003, including a veto over legislation, and power to dismiss the cabinet at whim.
In some semi-presidential systems, a president may be an active player in government, with the cabinet answerable in practice both to the head of state and parliament. The most striking example is the current Fifth French Republic. In the French case, in those circumstances in which parliament is controlled by the party which the president belongs to, the president is usually the dominant political player in government. When, however, the 'opposition' to the president control parliament, given that the government is answerable to parliament, the president has little choice but to share power with an 'opposition' prime minister. When this occurs, it is called cohabitation. In France this has developed into the constitutional convention that the prime minister controls the internal policy agenda, with the president limiting his role to foreign affairs, subject to the cabinet.
In the vast majority of states, whether republics or monarchies, executive authority is vested, at least notionally, in the head of state. In presidential systems the head of state is the actual, de facto chief executive officer. Under parliamentary systems the executive authority is theoretically exercised by the head of state but in practice exercised on the advice of the prime minister or cabinet. This produces such terms as Her Majesty's Government and His Excellency's Government. Examples of parliamentary systems in which the head of state is notional chief executive include Australia, Austria, Canada, Denmark, France, Italy and the United Kingdom. The few exceptions include the Republic of Ireland, where executive authority is explicitly vested in the cabinet, and Sweden. The head of state may also be described, although, again, in parliamentary systems this is only a notional designation, as commander-in-chief of the armed forces.
Most states require that all bills passed by the house or houses of the legislature are signed into law by the head of state. In some states, such as the United Kingdom and the Republic of Ireland, the head of state is in fact formally considered a tier of parliament. In presidential systems the head of state often has power to veto a bill. In most parliamentary systems, however, the head of state cannot refuse to sign a bill, but may, in granting a bill their assent, nevertheless indicate that it was passed in accordance with the correct procedures. The signing of a bill into law is formally known as promulgation. Some Commonwealth of Nations states call this procedure granting the Royal Assent.
In some parliamentary systems the head of state retains certain powers, in relation to bills, that they may exercise at their discretion. They may have authority to:
As the above quote by Charles de Gaulle indicates, one of the most important roles of the modern head of state is being a symbolic national symbol of the nation.
In most countries portraits of the head of state can be found in government offices, airports, libraries, and other buildings of the sort. The idea is to use these portraits to make the public aware of the symbolic connection to the government, a practice that dates back to mediaeval times. Sometimes this practice is taken to excess, and the head of state begins to believe that he is the only symbol of the nation. A personality cult thus ensues, where the image of the head of state is the only visual representation of the country, surpassing other symbols such as the flag, constitution, founding fathers, etc.
In diplomatic affairs, heads of state are often the first person to greet an important foreign visitor. They may also assume a sort of informal "host" role during the VIP's visit, inviting the visitor to a state dinner at his or her mansion or palace, or some other equally hospitable affair.
A heads of state may acquire their position in a number of ways:
In some cases, where one person holds multiple headships of state, they may be represented by a governor-general. Examples are Canada, Australia and New Zealand, where the monarch, Queen Elizabeth II, resides in another of her kingdoms, the United Kingdom, and so is represented by a governor-general. Nations outside of the UK that recognise Elizabeth II as their queen are known as Commonwealth Realms, and maintain ties to the monarchy as a recognition of their colonial history.
The governor-general may fulfill many of the roles of a head of state, but is not legally the head of state, rather an appointed representative of the head of state that may act in her place in her absence from the state. A governor-general may be considered de facto head of state as the monarch rarely exercises the reserve powers of the crown. See, for example, the Queen of Canada.
Every head of state is provided with a state residence or residences, often called a 'palace'. Among the most famous such residences are: