Pan-Germanism (German: Pangermanismus or Alldeutsche Bewegung), also occasionally known as Pan-Germanicism, is a pan-nationalist political idea. Pan-Germanists originally sought to unify all the German-speaking people – and possibly also non-German Germanic-speaking peoples – in a single nation-state known as the Greater Germanic Reich (German: Großgermanisches Reich), fully styled the Greater Germanic Reich of the German Nation (German: Großgermanisches Reich der Deutschen Nation).
Pan-Germanism was highly influential in German politics in the 19th century during the unification of Germany when the German Empire was proclaimed as a nation-state in 1871 but without Habsburg Austria, Luxembourg and Liechtenstein (Kleindeutsche Lösung/Lesser Germany) and the first half of the 20th century in the Austro-Hungarian Empire and the German Empire. From the late 19th century, many Pan-Germanist thinkers, since 1891 organized in the Pan-German League, had adopted openly ethnocentric and racist ideologies, and ultimately gave rise to the foreign policy Heim ins Reich pursued by Nazi Germany under Austrian-born Adolf Hitler from 1938, one of the primary factors leading to the outbreak of World War II.[1][2][3][4] As a result of the Second World War, there was a clear backlash against Pan-Germanism and other related ideologies. Today, pan-Germanism is mainly limited to a few nationalist groups, mainly on the political far right in Germany and Austria.