The Chancellor of Germany is the head of government of Germany. The official title in German is Bundeskanzler(-in) (literally, Federal Chancellor), often shortened to Kanzler(-in).

In German politics the Chancellor is equivalent to that of a Prime Minister in many other countries. The German term directly equivalent of Prime Minister, Ministerpräsident, is used for the heads of government of most German states (referred to in German as Länder, literally "countries") as well as foreign countries.

The current Chancellor is Angela Merkel, who was re-elected in 2009 after her first election in 2005. She is the first female Chancellor. In German she is thus known as Bundeskanzlerin. That particular word was never used officially before Merkel, but it is a grammatically regular formation of a noun denoting a female.

The modern office of Chancellor evolved from the position created for Otto von Bismarck in the North German Confederation in 1867; the Confederation evolved into a German nation-state with the 1871 Unification of Germany. The role of the Chancellor has varied greatly throughout Germany's modern history. Today, the Chancellor is widely considered to be the country's effective leader.

Angela Dorothea Merkel, German: [aŋˈɡeːla doʁoˈteːa ˈmɛʁkl̩] ( listen); née Kasner (born 17 July 1954) is the Chancellor of Germany and Chairwoman of the Christian Democratic Union (CDU). Merkel is the first female Chancellor of Germany.

A physical chemist by professional background, Merkel entered politics in the wake of the Revolutions of 1989 and briefly served as the deputy spokesperson for Lothar de Maizière's democratically elected East German government prior to the German reunification. Following reunification in 1990, she was elected to the Bundestag, where she has represented the state of Mecklenburg-Vorpommern since. She served as Federal Minister for Women and Youth 1991–1994 and as Federal Minister for the Environment, Nature Conservation and Nuclear Safety 1994–1998 in Helmut Kohl's fourth and fifth cabinets. She was Secretary General of the CDU 1998–2000, and was elected chairperson in 2000. From 2002 to 2005, she was also chair of the CDU/CSU parliamentary coalition.

After her election as Chancellor following the 2005 federal election, she led a grand coalition consisting of her own CDU party, its Bavarian sister party, the Christian Social Union (CSU), and the Social Democratic Party of Germany (SPD), until 2009. In the 2009 federal election, the CDU obtained the largest share of the votes, and formed a coalition government with the CSU and the liberal Free Democratic Party (FDP).

Manmohan Singh (Punjabi: ਮਨਮੋਹਨ ਸਿੰਘ [mənˈmoːɦən ˈsɪ́ŋɡ], Hindi: मनमोहन सिंह [mənˈmoːɦən ˈsɪŋɦ] ( listen); born 26 September 1932) is the 13th and current Prime Minister of India. He is the only Prime Minister since Jawaharlal Nehru to return to power after completing a full five-year term. A Sikh, he is the first non-Hindu to occupy the office. Singh is also the 7th Prime Minister from the Indian National Congress (Congress) party. He is a four-time Member of Parliament from the Upper House of the Parliament of India, the Rajya Sabha, representing the state of Assam. His term in the 14th Rajya Sabha was from 22 May 2004 to 26 February 2009. In the 15th Rajya Sabha his term started 22 May 2009 and is scheduled to continue till 2014. On 27 May 2012, he became the first Indian Prime Minister to visit Myanmar in 25 years.

Born in Gah, Punjab in British India (now Pakistan) in 1932, he migrated to India with his family at the time of Partition in 1947. Singh studied at Panjab University, University of Cambridge and University of Oxford. Thereafter, while Singh was working at United Nations Conference on Trade and Development (UNCTAD), Lalit Narayan Mishra, the then Indian Minister for Foreign Trade, appointed Singh as an advisor to his ministry. He was appointed Governor of the Reserve Bank of India between 1982 and 1985, Deputy Chairman of the Planning Commission of India from 1985 to 1987 and Secretary General of the South Commission from 1987 to 1990. Elected to the Rajya Sabha in 1991, he was inducted into Prime Minister P. V. Narasimha Rao's cabinet as Finance Minister the same year, a post he held until 1996. His tenure as Finance Minister is best remembered for the economic reforms he carried out, which ended the Licence Raj system and helped open the Indian economy.

Adolf Hitler (German: [ˈadɔlf ˈhɪtlɐ] ( listen); 20 April 1889 – 30 April 1945) was an Austrian-born German politician and the leader of the National Socialist German Workers Party (German: Nationalsozialistische Deutsche Arbeiterpartei (NSDAP), commonly referred to as the Nazi Party). He was chancellor of Germany from 1933 to 1945 and dictator of Nazi Germany (as Führer und Reichskanzler) from 1934 to 1945. Hitler is commonly associated with the rise of fascism in Europe, World War II, and the Holocaust.

A decorated veteran of World War I, Hitler joined the German Workers' Party, precursor of the Nazi Party, in 1919, and became leader of the NSDAP in 1921. In 1923, he attempted a coup d'état, known as the Beer Hall Putsch, in Munich. The failed coup resulted in Hitler's imprisonment, during which time he wrote his memoir, Mein Kampf (My Struggle). After his release in 1924, Hitler gained popular support by attacking the Treaty of Versailles and promoting Pan-Germanism, antisemitism, and anticommunism with charismatic oratory and Nazi propaganda. After his appointment as chancellor in 1933, he transformed the Weimar Republic into the Third Reich, a single-party dictatorship based on the totalitarian and autocratic ideology of Nazism. His aim was to establish a New Order of absolute Nazi German hegemony in continental Europe.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.