International Democracy Union

The International Democracy Union (IDU; known as the International Democrat Union until September 2023) is an international alliance of centre-right political parties. Headquartered in Munich, Germany, the IDU consists of 84 full and associate members from 65 countries. It is chaired by Stephen Harper, former prime minister of Canada. It has two affiliated international organizations (International Young Democrat Union and International Women's Democracy Union) and six affiliated regional organizations (Union of Latin American Parties, Asia Pacific Democrat Union, Caribbean Democrat Union, Democrat Union of Africa, European People's Party and European Conservatives and Reformists Party).

The IDU allows centre-right conservative political parties around the world to establish contacts and discuss different views on public policy and related matters. Their stated goal is the promotion of "democracy and [of] center-right policies around the globe". The IDU has some overlap of member parties with the Centrist Democrat International (CDI), but the CDI is more centrist, Christian democrat and communitarian than the IDU.

The group was founded in 1983 as the umbrella organisation for the European Democrat Union (EDU), Caribbean Democrat Union (CDU), and the Asia Pacific Democrat Union (APDU). Created at the instigation of the Konrad Adenauer Foundation and U.S. Vice President George H. W. Bush, the organisation was founded at a joint meeting of the EDU and APDU in London, United Kingdom.

Founding
The IDU was founded in London on 24 June 1983. According to Richard V. Allen, to be admitted as a member, a party must qualify as a "mainstream conservative" party influenced by classical liberalism.

The founding declaration was signed by 19 persons:

Former members

 * 🇦🇷 – Justicialist Party
 * 🇧🇦 – Party of Democratic Action
 * 🇧🇦 – Croatian Democratic Union 1990
 * 🇧🇷 – Democrats
 * 🇨🇦 – Progressive Conservative Party of Canada
 * 🇩🇴 – Social Christian Reformist Party
 * 🇫🇷 – Rally for the Republic
 * 🇫🇷 – Union for a Popular Movement
 *  – National Advancement Party
 *  – National Party of Honduras
 * 🇭🇺 – Fidesz
 * 🇮🇳 – Bharatiya Janata Party
 *  – Liberal Democratic Party
 *  – Liberal Democratic Party of Moldova
 * 🇳🇮 – Conservative Party
 *  – Social Democratic Party
 * 🇷🇺 – Union of Right Forces
 * 🇷🇸 – Democratic Party of Serbia
 * 🇷🇸 – United Regions of Serbia
 * 🇪🇸 – People's Alliance
 * 🇪🇸 – People's Democratic Party