The period between the end of World War I in 1918 and the outbreak of World War II in 1939, commonly referred to as the Interwar period, was an era of profound political, economic, and social transformation across Europe. While the continent sought to rebuild from the devastation of the Great War, new and dangerous ideologies took root. Among the most consequential developments was the dramatic intensification of anti-Semitism and the institutionalization of racial policies that would ultimately pave the way for the Holocaust. This article explores the complex factors that fueled the rise of anti-Jewish sentiment, the spread of pseudo-scientific racial theories, the legislative frameworks that codified discrimination, and the international context that allowed such hatred to flourish.

The Political Climate of Interwar Europe

The armistice of 1918 did not bring stability; instead, it unleashed a cascade of crises. The collapse of the Austro-Hungarian, Ottoman, German, and Russian empires left a power vacuum in Central and Eastern Europe. Newly independent states such as Poland, Czechoslovakia, and Yugoslavia struggled to forge cohesive national identities while dealing with significant ethnic minorities. Hyperinflation in Germany, Austria, and Poland wiped out savings and destabilized middle-class life. In Germany alone, the 1923 hyperinflation saw the mark become worthless, leaving millions impoverished and bitter. Mass unemployment, especially after the 1929 Wall Street crash, created armies of disaffected workers and veterans.

The Treaty of Versailles, with its punitive reparations, territorial losses, and the infamous "war guilt clause," fostered deep resentment in Germany. Many Germans refused to accept defeat and instead embraced the myth of an undefeated army betrayed by internal enemies. New democracies were fragile: Weimar Germany had 20 cabinets in 14 years, while states like Italy slid into fascism, and Hungary oscillated between a monarchy without a king and authoritarian regimes. In this volatile environment, radical political movements—both fascist and communist—found fertile ground. Nationalist rhetoric often targeted minority groups as internal enemies, blaming them for military defeats, economic collapse, and the erosion of traditional values. Jews, in particular, were cast as a ubiquitous and disloyal "alien" presence, a myth that had deep historical roots but now acquired a deadly modern form.

Historical Roots of Anti-Semitism in Europe

European anti-Semitism was not a creation of the 20th century. For centuries, Jews had been subjected to religious persecution, forced conversions, expulsions, and economic restrictions. The medieval blood libel—the accusation that Jews murdered Christian children to use their blood in rituals—and claims of host desecration were revived in modern propaganda. In 19th-century France, the Dreyfus Affair (1894–1906) exposed pervasive anti-Semitism in the military and society, revealing that even in an ostensibly enlightened republic, Jews could be scapegoated as traitors. By the time of Jewish emancipation in Western Europe, new anxieties emerged: many nationalists viewed Jewish integration as a threat to national purity. Economic anti-Semitism portrayed Jews as greedy capitalists and, paradoxically, as revolutionary Bolsheviks. The Protocols of the Elders of Zion, a forged document fabricated by the Tsarist secret police in the late 19th century, spread the fiction of a global Jewish conspiracy to dominate the world. These themes would be powerfully reanimated after World War I, providing a ready-made toolkit for politicians seeking scapegoats.

The Rise of Anti-Semitism in Post-WWI Europe

In the immediate postwar years, anti-Semitism erupted with new virulence. In Germany, the "stab-in-the-back" legend falsely accused Jews and socialists of betraying the undefeated German army, leading to the nation's defeat. This lie was central to the Nazi Party's propaganda from its earliest days. The economic chaos of the early 1920s, especially the 1923 hyperinflation, was blamed on Jewish financiers. Throughout Central and Eastern Europe, the disintegration of multinational empires left Jews as a highly visible minority in newly formed nation-states. Nationalist governments often denied Jews full citizenship rights, and violent pogroms erupted with horrific frequency. Between 1918 and 1920 alone, tens of thousands of Jews were murdered in Ukraine, Poland, and Belarus during the Russian Civil War and the Polish-Ukrainian conflict. The Lviv pogrom of 1918 saw Polish soldiers and civilians massacre hundreds of Jews, accusing them of supporting the opposing Ukrainian side. Such violence set a terrifying precedent for the state-sanctioned persecution that would follow.

Beyond physical violence, economic boycotts became organized. In Poland, the Endecja (National Democracy) party led by Roman Dmowski called for a "Polish economy for Poles," urging customers to avoid Jewish shops. Similar boycotts occurred in Romania, Hungary, and the Baltic states. Jewish communities, already impoverished by war and displacement, found themselves increasingly isolated and vulnerable.

Racial Theories and Pseudo-Science

Anti-Semitism during the Interwar period was increasingly grounded not merely in religious or cultural prejudice, but in pseudo-scientific racial theories. The late 19th and early 20th centuries had seen the rise of "scientific racism" and eugenics, which sought to classify humanity into distinct biological races with innate and immutable traits. Thinkers like Arthur de Gobineau, a French aristocrat, propagated the myth of Aryan superiority in his Essay on the Inequality of the Human Races (1853–1855). Houston Stewart Chamberlain, a British-born Germanophile, refined these ideas in his 1899 work The Foundations of the Nineteenth Century, arguing that Aryan races were the creators of all civilization, while Jews were a parasitic, destructive force. These ideas were adopted and radicalized by the Nazi regime. The American eugenicist Madison Grant's The Passing of the Great Race (1916) also influenced Nazi racial thought, illustrating the transnational spread of such ideologies. The concept of Rassenschande (racial defilement) became a cornerstone of Nazi ideology, framing sexual relations between Jews and non-Jews as a biological crime. Such theories had a profound influence on the legislation that followed, providing a pseudo-intellectual veneer for state-sponsored hatred.

Eugenics movements flourished worldwide, but in Germany they took on a particularly vicious character. The Law for the Prevention of Hereditarily Diseased Offspring (1933) forced the sterilization of tens of thousands of people with disabilities, chronic alcoholism, or mental illness. This legislation set the stage for broader racial purification. The Nazi regime invested heavily in "racial science" institutes, where anthropologists measured skulls, studied blood types, and classified populations to justify discrimination. These pseudo-scientific practices lent an aura of objectivity to policies that were in reality driven by prejudice and political expediency.

Anti-Semitic Policies and Legislation Across Europe

The ideological shift from religious to racial anti-Semitism allowed governments to pass sweeping laws aimed at isolating, impoverishing, and ultimately removing Jews from public life. While Nazi Germany's Nuremberg Laws of 1935 are the most infamous, they were part of a broader European pattern of legalized discrimination that unfolded unevenly but inexorably across the continent.

Germany: The Nuremberg Laws and Beyond

The Nuremberg Laws—the Reich Citizenship Law and the Law for the Protection of German Blood and German Honor—stripped Jews of their citizenship and forbade marriages and extramarital intercourse between Jews and citizens of "German or kindred blood." These laws, announced at the Nazi Party rally in September 1935, provided the legal framework for the systematic exclusion of Jews from the economy, education, and all facets of civil society. They were followed by a cascade of supplementary decrees that defined who was considered a Jew based on ancestry, not religion. A person with three or four Jewish grandparents was considered a Jew; those with fewer were classified as Mischlinge (mixed-breeds), whose status remained ambiguous and precarious. This legal model would later be used to confiscate property and facilitate forced emigration. The subsequent "Aryanization" of Jewish businesses, expropriation of assets, and the establishment of ghettos in occupied Poland all rested on this legislative foundation.

Eastern and Central Europe: Hungary, Poland, and Romania

The surge of anti-Semitic legislation was not limited to Germany. Hungary, under the regency of Miklós Horthy, introduced a numerus clausus law in 1920 that restricted Jewish enrollment in universities to their proportion of the population—the first such law in modern Europe. This measure was later expanded in the 1930s with a series of "Jewish Laws" that limited Jewish participation in the professions, business, and the press. In 1938, Hungary passed the First Jewish Law, restricting the number of Jews in the liberal professions and white-collar jobs to 20 percent, later reduced to 6 percent in 1939. In Poland, the interwar years saw widespread economic boycotts of Jewish merchants, the reinstatement of medieval-style ghetto benches in universities, and eventually calls for mass emigration. The Polish government actively explored the forced relocation of Jews to Madagascar, a scheme that the French government considered as well. By 1937, the Polish government passed laws prohibiting ritual slaughter (shechita), devastating Jewish communities reliant on kosher meat production. Romania enacted citizenship laws that left many Jews stateless; the 1938 revision of Romanian citizenship stripped up to a third of Romanian Jews of their nationality. The far-right Iron Guard promoted vicious anti-Semitic violence, including the assassination of Prime Minister I.G. Duca in 1933. By the late 1930s, laws in Romania mimicked the Nuremberg model, revoking citizenship, expelling Jews from professions, and dispossessing them of property.

Fascist Italy and the 1938 Racial Laws

Fascist Italy under Mussolini initially presented itself as less overtly anti-Semitic than Nazi Germany, and some Jews had even joined the Fascist Party. However, under Hitler's influence and Mussolini's drift toward a more radical vision of racial empire, Italy enacted its own Racial Laws in 1938. These laws excluded foreign-born Jews from Italy, expelled Jewish students and teachers from public schools, and prohibited marriages between Jews and non-Jewish Italians. A "Manifesto of Race" was published, declaring Italians to be of Aryan origin and Jews as not belonging to the Italian race. Though not as brutally enforced as in Germany until the German occupation after 1943, they marked a decisive turning point and normalized state-sponsored anti-Semitism in a country that had previously been a refuge for persecuted Jews from other parts of Europe.

Western Democracies: Subtler but Real

Even in countries with liberal democratic traditions, anti-Semitism shaped policy and public opinion. France, traumatized by the Dreyfus Affair decades earlier, saw a resurgence of anti-Semitic leagues and press campaigns in the 1930s. Figures like Charles Maurras and his Action Française movement called for the exclusion of Jews from French public life. While no racial laws were enacted, xenophobic and anti-Semitic sentiment influenced strict immigration policies and a broader climate of suspicion. Britain's Aliens Act of 1905 and subsequent interwar restrictions were often aimed at limiting Jewish immigration from Eastern Europe. The British Union of Fascists under Oswald Mosley, though a minority movement, openly promoted anti-Semitism and staged provocative marches through Jewish neighborhoods. The United States, while not European, played a crucial role through its restrictive immigration quotas under the Immigration Act of 1924, which effectively barred many Jews from finding refuge. The tragic voyage of the St. Louis in 1939—a ship carrying over 900 Jewish refugees that was turned away from Cuba and the United States—symbolized the international community's indifference.

The Impact on Jewish Communities and Other Targeted Groups

The cumulative effect of these policies was devastating. Across the continent, Jews were systematically pushed out of economic life. In Germany, the "Aryanization" of businesses transferred Jewish-owned enterprises to non-Jews at a fraction of their value. Professionals—lawyers, doctors, academics—were stripped of their livelihoods. By 1938, Jewish doctors could only treat Jewish patients; Jewish lawyers were disbarred; Jewish journalists were banned from writing. Cultural life was shattered; Jewish artists and intellectuals were silenced, and their works were banned or burned in the notorious book burnings of May 1933. The psychological violence was immense, as neighbors and colleagues became perpetrators or indifferent bystanders. Jewish children were humiliated in schools, often forced to sit on separate benches or expelled entirely.

In Eastern Europe, the situation was even more volatile. Pogroms continued into the 1930s; the 1936 Przytyk pogrom in Poland saw a mob attack the Jewish quarter, killing three and injuring dozens, sparking national debate about anti-Jewish violence. Hundreds of thousands of Jews became impoverished and increasingly desperate to emigrate. Organizations such as the American Jewish Joint Distribution Committee provided humanitarian relief, but the scale of need far outstripped resources. Many Jews sought to escape, but they faced closed doors—strict quotas in the United States, restrictive British immigration policies in Palestine (the 1939 White Paper severely limited Jewish immigration), and reluctance from most nations to admit refugees. The Evian Conference of 1938, called by President Roosevelt, became a tragic symbol of global apathy: 32 nations expressed sympathy but only the Dominican Republic offered to accept Jewish refugees.

Racial Policies Beyond Anti-Semitism: Persecution of Roma, Slavs, and Others

It is essential to understand that the racial ideologies of the Interwar period targeted more than just Jews. The Nazis and like-minded movements constructed a broad racial hierarchy. The Roma (Gypsies) were classified as "racially inferior" and faced similar—and often simultaneous—persecution. In 1936, a Reich Central Office for the Fight against the Gypsy Nuisance was established, leading to mandatory registration, sterilization, and eventually deportation to concentration camps. Sterilization programs aimed at persons with disabilities, "habitual criminals," and those deemed "asocial" were implemented in Germany and later in occupied territories. The Law for the Prevention of Hereditarily Diseased Offspring resulted in over 400,000 forced sterilizations by 1945. The entire Slavic population of Eastern Europe was considered Untermenschen (subhumans), a worldview that would justify Nazi plans for enslavement and extermination during the war. The German occupation of Poland and the Soviet Union unleashed a wave of mass murder targeting intellectuals, clergy, and political leaders. These interlocking policies reveal that anti-Semitism was the most extreme expression of a deeply racist European order that many governments were willing to accept or actively pursue.

International Response and the Impending Holocaust

Despite the staggering evidence of state-sponsored persecution, the international community's response was largely one of indifference and inaction. The League of Nations, established after World War I to maintain peace and protect minorities, proved powerless. Its minority protection treaties were consistently violated, and member states were unwilling to intervene in the internal affairs of sovereign nations. The 1938 Evian Conference convened to address the refugee crisis became a tragic symbol of global apathy. Delegation after delegation expressed sympathy for the Jews but refused to increase their immigration quotas or alter their restrictive policies. Only the Dominican Republic opened its doors to a small number of refugees. As Nazi aggression escalated—the annexation of Austria in March 1938, the Munich Agreement in September 1938, and the invasion of Czechoslovakia in March 1939—the fate of European Jews was sealed. The November 1938 Kristallnacht pogrom in Germany, coordinated by the state, destroyed thousands of synagogues, businesses, and homes, and sent over 30,000 Jewish men to concentration camps. Yet the world largely condemned the violence verbally while doing little to offer refuge.

Legacy and Lessons for Today

The Interwar period stands as a stark warning from history. It demonstrates how economic instability, nationalist fervor, and the deliberate spread of hatred can transform a civilized society into an engine of mass murder. The anti-Semitic and racial policies of those years did not arise overnight; they were built on a foundation of centuries-old prejudice, modernized by pseudo-science, and enforced by state machinery long before the first concentration camp opened. The gradual escalation—from discriminatory laws to boycotts to physical violence to genocide—shows that the steps on the path to atrocity are often incremental and normalized by public indifference.

Studying this era is not merely an academic exercise. It reminds us that discrimination begins with words and laws, and that a failure to respond resolutely by the international community allows persecution to escalate into genocide. The Nuremberg Laws and similar legislation across Europe were crucial steps on the path to the Holocaust, and they teach the enduring importance of defending human rights and challenging racist ideologies wherever they appear. The memory of those who suffered and resisted during the Interwar period compels us to remain vigilant against the resurgence of anti-Semitism and all forms of racial hatred in our own time. As new nationalist movements emerge and conspiracy theories find new audiences online, the lessons of the 1920s and 1930s have never been more urgent.