The ideological foundation of the
Ustaše movement reaches back to the 19th century when
Ante Starčević established the
Party of Rights, as well as when
Josip Frank seceded his extreme fraction from it and formed his own Pure Party of Rights. Starčević was a major ideological influence on the
Croatian nationalism of the Ustaše. He was an advocate of Croatian unity and independence and was both anti-
Habsburg, as Starčević saw the main Croatian enemy in the Habsburg Monarchy, and
anti-Serb. He envisioned the creation of a
Greater Croatia that would include territories inhabited by
Bosniaks,
Serbs, and
Slovenes, considering Bosniaks and Serbs to be
Croats who had been converted to
Islam and
Eastern Orthodox Christianity. In his demonization of the Serbs he claimed "how the Serbs today are dangerous for their ideas and their racial composition, how a bent for conspiracies, revolutions and coups is in their blood." Starčević called the Serbs an "unclean race", a "nomadic people" and "a race of slaves, the most loathsome beasts", while the co-founder of his party,
Eugen Kvaternik, denied the existence of
Serbs in Croatia, seeing their political consciousness as a threat.
Milovan Đilas cites Starčević as the "father of
racism" and "ideological father" of the Ustaše, while some Ustaše ideologues have linked Starčević's racial ideas to
Adolf Hitler's
racial ideology. Frank's party embraced Starčević's position that Serbs were an obstacle to Croatian political and territorial ambitions, and the aggressive anti-Serb attitudes became one of the main characteristics of the party. The followers of the ultranationalist Pure Party of Right were known as the
Frankists (
Frankovci) and they would become the main pool of members of the subsequent Ustaše movement. Following the defeat of the
Central Powers in
World War I and the collapse of
Austria-Hungarian Empire, the
provisional state was formed on the southern territories of the Empire which joined the
Allies-associate
Kingdom of Serbia to form the
Kingdom of Serbs, Croats and Slovenes (later known as Yugoslavia), ruled by the Serbian
Karađorđević dynasty. Historian John Paul Newman explained that the influence of the Frankists, as well as the legacy of World War I, had an impact on the Ustaše ideology and their future genocidal means. Many war veterans had fought at various ranks and on various fronts on both the '
victorious' and '
defeated' sides of the war. Serbia suffered
the biggest casualty rate in the world, while Croats fought in the Austro-Hungarian army and two of them served as military governors of
Bosnia and
occupied Serbia. They both endorsed Austria–Hungary's denationalizing plans in Serb-populated lands and supported the idea of incorporating a tamed Serbia into the Empire. Newman stated that Austro-Hungarian officers' "unfaltering opposition to Yugoslavia provided a blueprint for the Croatian radical right, the Ustaše". The Frankists blamed
Serbian nationalists for the defeat of Austria-Hungary and opposed the creation of Yugoslavia, which was identified by them as a cover for
Greater Serbia. Мass Croatian national consciousness appeared after the establishment of a common state of South Slavs and it was directed against the new Kingdom, more precisely against Serbian predominance within it. Early 20th century Croatian intellectuals
Ivo Pilar,
Ćiro Truhelka and
Milan Šufflay influenced the Ustaše concept of nation and racial identity, as well as the theory of Serbs as an inferior race. Pilar, historian, politician and lawyer, placed great emphasis on
racial determinism arguing that Croats had been defined by the "
Nordic-
Aryan" racial and cultural heritage, while Serbs had "interbred" with the "Balkan-Romanic
Vlachs". Truhelka, archeologist and historian, claimed that Bosnian Muslims were ethnic Croats, who, according to him, belonged to the
racially superior Nordic race. On the other hand, Serbs belonged to the "
degenerate race" of the Vlachs. The Ustaše promoted the theories of historian and politician Šufflay, who is believed to have claimed that Croatia had been "one of the strongest ramparts of Western civilization for many centuries", which he claimed had been lost through its union with Serbia when the nation of Yugoslavia was formed in 1918. The outburst of Croatian nationalism after 1918 was one of the main threats for Yugoslavia's stability. During the 1920s,
Ante Pavelić, lawyer, politician and one of the Frankists, emerged as a leading spokesman for Croatian independence. In 1927, he secretly contacted
Benito Mussolini, dictator of
Italy and founder of
fascism, and presented his
separatist ideas to him. Pavelić proposed an independent Greater Croatia that should cover the entire historical and ethnic area of the Croats. In that period, Mussolini was interested in Balkans with the aim of isolating Yugoslavia, by strengthening Italian influence on the east coast of the
Adriatic Sea. British historian
Rory Yeomans claims that there are indication that Pavelić had been considering the formation of some kind of nationalist insurgency group as early as 1928. , one of the
Frankists and the leading spokesman for Croatian independence in interwar Yugoslavia, founded the
Ustaše movement In June 1928,
Stjepan Radić, the leader of the largest and most popular Croatian party
Croatian Peasant Party (, HSS) was mortally wounded in the
parliamentary chamber by
Puniša Račić, a
Montenegrin Serb leader, former
Chetnik member and deputy of the ruling Serb
People's Radical Party. Račić also shot two other HSS deputies dead and wounded two more. The killings provoked violent student protests in
Zagreb. Trying to suppress the conflict between Croatian and Serbian political parties, King
Alexander I proclaimed a
dictatorship with the aim of establishing the "integral
Yugoslavism" and a single
Yugoslav nation. The introduction of the royal dictatorship brought separatist forces to the fore, especially among the Croats and
Macedonians. The
Ustaša – Croatian Revolutionary Movement () emerged as the most extreme movement of these. The Ustaše was created in late 1929 or early 1930 among radical and militant student and youth groups, which existed from the late 1920s. Precisely, the movement was founded by journalist
Gustav Perčec and Ante Pavelić. They were driven by a deep hatred of Serbs and Serbdom and claimed that, "Croats and Serbs were separated by an unbridgeable cultural gulf" which prevented them from ever living alongside each other. Pavelić accused the Belgrade government of propagating "a barbarian culture and
Gypsy civilization", claiming they were spreading "
atheism and bestial mentality in divine Croatia". Supporters of the Ustaše planned genocide years before World War II, for example one of Pavelić's main ideologues,
Mijo Babić, wrote in 1932 that the Ustaše "will cleanse and cut whatever is rotten from the healthy body of the Croatian people". In 1933, the Ustaše presented "The Seventeen Principles" that formed the official ideology of the movement. The Principles stated the uniqueness of the Croatian nation, promoted collective rights over individual rights and declared that people who were not Croat by "
blood" would be excluded from political life. In order to explain what they saw as a "terror machine", and regularly referred to as "some excesses" by individuals, the Ustaše cited, among other things, policies of the inter-war Yugoslav government which they described as Serbian
hegemony "that cost the lives of thousand Croats". Historian
Jozo Tomasevich explains that that argument is not true, claiming that between December 1918 and April 1941 about 280 Croats were killed for political reasons, and that no specific motive for the killings could be identified, as they may also be linked to clashes during the agrarian reform. Moreover, he stated that Serbs too were denied civil and political rights during the royal dictatorship. However, Tomasevich explains that the anti-Croatian policies of the Serbian-dominated Yugoslav government in the 1920s and 1930s, as well as, the shooting of the HSS deputies by Radić were largely responsible for the creation, growth and nature of Croatian nationalist forces. This culminated in the Ustaše movement and ultimately its anti-Serbian policies in World War II, which was totally out of proportions to earlier anti-Croatian measures, in nature and extent. Yeomans explains that Ustaše officials constantly emphasized crimes against Croats by the Yugoslav government and security forces, although many of them were imagined, though some of them real, as justification for their envisioned eradication of the Serbs. Political scientist Tamara Pavasović Trošt, commenting on historiography and textbooks, listed the claims that terror against Serbs arose as a result of "their previous hegemony" as an example of the
relativisation of Ustaše crimes. Historian
Aristotle Kallis explained that anti-Serb prejudices were a "chimera" which emerged through living together in Yugoslavia with continuity with previous stereotypes. The Ustaše functioned as a
terrorist organization as well. The first Ustaše center was established in
Vienna, where brisk anti-Yugoslav propaganda soon developed and agents were prepared for terrorist actions. They organized the so-called
Velebit uprising in 1932, assaulting a police station in the village of Brušani in
Lika. In 1934, the Ustaše cooperated with Bulgarian, Hungarian and Italian right-wing extremists to assassinate King Alexander while he visited the French city of
Marseille. Pavelić's fascist tendencies were apparent. The Ustaše movement was financially and ideologically supported by Benito Mussolini. During the intensification of ties with
Nazi Germany in the 1930s, Pavelić's concept of the Croatian nation became increasingly race-oriented. == Independent State of Croatia ==