Presidential system

A presidential system is a special way that countries can be run. In this system, a person called a president leads the government. This president is usually also the leader of the country. The president gets their power from the people who vote for them, not from the group of leaders called the legislature. This is different from another system called a parliamentary system, where the leader, often called a prime minister, gets their power from the legislature.

The presidential system was made famous by the Constitution of the United States. It started when leaders in the early United States chose this way of governing. Today, many countries use this system. It is most common in the Americas and also used in places like Sub-Saharan Africa, South Korea, Syria, the Philippines, and Indonesia. However, it is not very common in Europe, where only Cyprus and Turkey use it.

History

Development in the Americas

The presidential system began in the 17th century in the British colonies that are now the United States. The Pilgrims in Plymouth Colony created a system where a governor was chosen each year by the colonial legislature, along with some assistants, similar to today's cabinets. They also appointed other officials like constables and messengers.

The first true presidential system was created during the United States Constitutional Convention in 1787. The delegates were inspired by earlier colonial governments, English Common Law, and thinkers like John Locke and Montesquieu. The Constitution of the United States came into force in 1789, making the United States the first presidential republic, with George Washington as its first president.

In the 1810s and 1820s, many Spanish colonies in Latin America gained independence and adopted the presidential system, copying the United States. Brazil also switched to a presidential system in 1889, with Deodoro da Fonseca as its first president. However, many of these countries faced unstable governments and periods of dictatorial rule.

As a global system

The Philippines set up the first presidential system in Asia in 1898, but it was under American control after the Spanish–American War. The system was restored when the Philippines became independent in 1946.

After World War II, the United States helped South Korea create a presidential government, though its early years were marked by strong control. Indonesia also declared independence in 1945 and used a presidential system, but it was effectively a dictatorship until democratic changes in 1998. South Korea became a full democracy in 1987.

During the 1950s and 1960s, many new countries after decolonization chose the presidential system, including in Africa, Cyprus, the Maldives, and South Vietnam. Pakistan and Bangladesh also tried it but later changed their systems.

More countries adopted the presidential system in later decades. A changed version was used in Iran after 1989. Palau became independent in 1981 and chose the presidential system. After the Soviet Union broke up in 1991, many new countries tried the system, though most later changed to different forms of government.

In recent years, the presidential system continues to grow. South Sudan adopted it after gaining independence in 2011. Turkey switched to a presidential system in 2018. In 2025, Syria also established a presidential system.

Features

The presidential system is special because it separates the leader of the government (the president) from the lawmakers. This means the president is chosen by the people and works separately from the group that makes laws.

Portrait of James Wilson, who largely designed the powers of the president of the United States.

One big idea behind this system is that it keeps leaders accountable. The president can veto laws, forgive crimes, lead in foreign affairs, command the military, and manage government employees. This separation helps each part of the government check the others, which can prevent any one group from having too much power. However, it can also cause problems if the president and lawmakers disagree, making it hard to pass new laws.

Presidential systems are also known for having fixed terms, meaning the president serves for a set time before facing re-election. This can bring stability but may also make it hard to remove a president who is not working well until the next election.

Paradoxes

Presidential systems often face criticism because they contain contradictions. Leaders are given power but also limited by rules, which can cause tension. Elections for president are usually "winner-takes-all," meaning one side gets all the control, which can lead to more fighting and division among groups.

Presidential systems aim to create a strong leader who represents the whole nation. However, these systems also include rules to prevent too much power, like limits on how long a president can serve or ways for others to check the president’s actions. This mix of giving power and taking it away can make decision-making difficult and create stress in the government.

Compared to systems where the leader is chosen by a group of lawmakers, presidential systems can be less flexible. If something unexpected happens, like a president leaving office early, it can cause problems. Leaders in other systems can often fix things by voting or holding new elections, but in presidential systems, changing leaders can lead to big problems.

Zero-sum election

One problem with presidential elections is that they are often “winner-takes-all.” The person who wins gets all the power, which can make political battles very fierce. This can turn politics into a battle where one side tries to take everything from the other.

In systems where leaders are chosen by groups of lawmakers, parties often share power. This helps calm down fights because parties must work together. But presidents may feel they have full permission to lead, even if they only won by a small amount. This can make it harder for them to work with others.

Some countries have found ways to share power even with presidential systems. For example, in Venezuela and Colombia, parties sometimes agree to share power to keep things stable, showing that presidential systems can adapt but still face challenges.

The Spanish example

When Spain held its first free elections in 1977 after a period of strict rule, it used a system where leaders are chosen by a group of lawmakers. No single group had a majority, so parties had to work together. If Spain had used a presidential system instead, things might have been very different and more divisive.

Without a clear majority, building a coalition would have been difficult and uncertain. Both the left and right would have had to make risky alliances, which could have caused confusion and pushed away voters.

Spain’s choice to use a parliamentary system helped parties work together and change slowly over time. This helped the country build a stable democracy, showing that systems where leaders are chosen by lawmakers can reduce fighting and help nations change peacefully.

Comparative politics

The main difference between a presidential system and a parliamentary system is that in a presidential system, the head of government is elected separately from the legislature. In a parliamentary system, the head of government must answer to the legislature. Presidential systems always have a clear separation of powers, while parliamentary systems may or may not.

Sometimes, a country may use a mix of both systems, called a semi-presidential system. In this system, both an elected president and a prime minister share power. The president often handles foreign policy, while the prime minister manages daily government affairs. Even in pure presidential systems, the legislature can sometimes check the president's power, for example through special voting processes or the ability to remove the president in serious situations.

Presidentialism metrics

Presidentialism metrics help compare how strong the presidential system is in different countries. These metrics include the presidential index in V-Dem Democracy indices and presidential power scores. The table below shows the V-Dem presidential index for individual countries, where higher values mean more political power is held by one individual.

Subnational governments

Some local or state governments use a presidential system even if their country does not. For example, all state governments in the United States use a presidential system, with the leader called a Governor instead of a President. Similarly, on a local level, a mayor may act like a president. Some countries, like Japan, use a parliamentary system nationally but may have presidential-like systems in their local governments.