Early years

Childhood and heritage

Adolf Hitler as an infant.
Adolf Hitler was born in Braunau am Inn, Austria, the fourth child of six. His father, Alois Hitler, (1837–1903), was a customs official. His mother, Klara Pölzl, (1860–1907), was Alois' third wife. She was also his half-niece, so a papal dispensation had to be obtained for the marriage. Of Alois and Klara's six children, only Adolf and his sister Paula reached adulthood. Hitler's father also had a son, Alois Jr, and a daughter, Angela, by his second wife.
Alois Hitler was born illegitimate. For the first 39 years of his life he bore his mother's surname, Schicklgruber. In 1876, he took the surname of his stepfather, Johann Georg Hiedler. The name was spelled Hiedler, Huetler, Huettler and Hitler and probably changed to "Hitler" by a clerk. The origin of the name is either from the German word Hittler and similar, "one who lives in a hut", "shepherd", or from the Slavic word Hidlar and Hidlarcek.
Allied propaganda exploited Hitler's original family name during World War II. Pamphlets bearing the phrase "Heil Schicklgruber" were airdropped over German cities. But he was legally born a Hitler and was also related to Hiedler via his maternal grandmother, Johanna Hiedler.
The name "Adolf" comes from Old High German for "noble wolf" (Adel=nobility + wolf). Hence, one of Hitler's self-given nicknames was Wolf or Herr Wolf—he began using this nickname in the early 1920s and was addressed by it only by intimates (as "Uncle Wolf" by the Wagners) up until the fall of the Third Reich. The names of his various headquarters scattered throughout continental Europe (Wolfsschanze in East Prussia, Wolfsschlucht in France, Werwolf in Ukraine, etc.) reflect this. By his closest family and relatives, Hitler was known as "Adi".
As a boy, Hitler said he was often whipped by his father. Years later he told his secretary, "I then resolved never again to cry when my father whipped me. A few days later I had the opportunity of putting my will to the test. My mother, frightened, took refuge in the front of the door. As for me, I counted silently the blows of the stick which lashed my rear end."
Hitler's paternal grandfather was most likely one of the brothers Johann Georg Hiedler or Johann Nepomuk Hiedler. There were rumours that Hitler was one-quarter Jewish and that his grandmother, Maria Schicklgruber, became pregnant while working as a servant in a Jewish household. The implications of these rumours were politically explosive for the proponent of a racist ideology. Opponents tried to prove that Hitler had Jewish or Czech ancestors. Although these rumours were never confirmed, for Hitler they were reason enough to conceal his origins. According to Robert G. L. Waite in The Psychopathic God: Adolf Hitler, Hitler made it illegal for German women to work in Jewish households, and after the "Anschluss" (annexation) of Austria, Hitler turned his father's hometown into an artillery practice area. Waite says that Hitler's insecurities in this regard may have been more important than whether Judaic ancestry could have been proven by his peers.

Ludwig Wittgenstein and Hitler in school in a photograph taken at the Linz Realschule in 1903.
Hitler's family moved often, from Braunau am Inn to Passau, Lambach, Leonding, and Linz. The young Hitler was a good student in elementary school. But in the sixth grade, his first year of high school (Realschule) in Linz he failed and had to repeat the grade. His teachers said that he had "no desire to work." One of Hitler's fellow pupils in the Realschule was Ludwig Wittgenstein, one of the great philosophers of the 20th century. A book by Kimberley Cornish suggests that conflict between Hitler and some Jewish students, including Wittgenstein, was a critical moment in Hitler's formation as an anti-Semite.
Hitler claimed his educational slump was a rebellion against his father, who wanted the boy to follow him in a career as a customs official; Hitler wanted to become a painter instead. This explanation is further supported by Hitler's later description of himself as a misunderstood artist. However, after Alois died on January 3, 1903, Hitler's schoolwork did not improve. At age 16, Hitler dropped out of high school without a degree.

Early adulthood in Vienna and Munich
From 1905 on, Hitler lived a bohemian life in Vienna on an orphan's pension and support from his mother. He was rejected twice by the Academy of Fine Arts Vienna (1907–1908), citing "unfitness for painting," and was told his abilities lay instead in the field of architecture. His memoirs reflect a fascination with the subject:
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The purpose of my trip was to study the picture gallery in the Court Museum, but I had eyes for scarcely anything but the Museum itself. From morning until late at night, I ran from one object of interest to another, but it was always the buildings which held my primary interest."
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Following the school rector's recommendation, he too became convinced this was the path to pursue, yet he lacked the proper academic preparation for architecture school:
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In a few days I myself knew that I should some day become an architect. To be sure, it was an incredibly hard road; for the studies I had neglected out of spite at the Realschule were sorely needed. One could not attend the Academy's architectural school without having attended the building school at the Technic, and the latter required a high-school degree. I had none of all this. The fulfillment of my artistic dream seemed physically impossible.

On December 21, 1907, Hitler's mother died of breast cancer at age 47. Ordered by a court in Linz, Hitler gave his share of the orphans' benefits to his sister Paula. When he was 21, he inherited money from an aunt. He struggled as a painter in Vienna, copying scenes from postcards and selling his paintings to merchants and tourists.
After being rejected a second time by the Academy of Arts, Hitler ran out of money. In 1909, he sought refuge in a homeless shelter. By 1910, he had settled into a house for poor working men.
Hitler says he first became an anti-Semite in Vienna, which had a large Jewish community, including Orthodox Jews who had fled from pogroms in Russia. But according to a childhood friend, August Kubizek, Hitler was a "confirmed anti-Semite" before he left Linz, Austria. Vienna at that time was a hotbed of traditional religious prejudice and 19th century racism. Hitler may have been influenced by the writings of the ideologist and anti-Semite Lanz von Liebenfels and polemics from politicians such as Karl Lueger, founder of the Christian Social Party and mayor of Vienna, the composer Richard Wagner, and Georg Ritter von Schönerer, leader of the pan-Germanic Away from Rome! movement. Hitler claims in Mein Kampf that his transition from opposing anti-Semitism on religious grounds to supporting it on racial grounds came from having seen an Orthodox Jew, but actually it seems Hitler was not very anti-Semitic in these years. He often was a guest for dinner in a noble Jewish house, and Jewish merchants tried to sell his paintings.
Hitler may also have been influenced by Martin Luther's On the Jews and their Lies. Kristallnacht took place on November 10—Luther's birthday.
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There were very few Jews in Linz. In the course of centuries the Jews who lived there had become Europeanized in external appearance and were so much like other human beings that I even looked upon them as Germans. The reason why I did not then perceive the absurdity of such an illusion was that the only external mark which I recognized as distinguishing them from us was the practice of their strange religion. As I thought that they were persecuted on account of their faith my aversion to hearing remarks against them grew almost into a feeling of abhorrence. I did not in the least suspect that there could be such a thing as a systematic anti-Semitism.
Once, when passing through the inner City, I suddenly encountered a phenomenon in a long caftan and wearing black side-locks. My first thought was: Is this a Jew? They certainly did not have this appearance in Linz. I carefully watched the man stealthily and cautiously but the longer I gazed at the strange countenance and examined it feature by feature, the more the question shaped itself in my brain: Is this a German?

In Mein Kampf, Hitler refers to Martin Luther as a great warrior, a true statesmen, and a great reformer, alongside Wagner and Frederick the Great. Wilhelm Röpke, writing after the Holocaust, concluded that "without any question, Lutheranism influenced the political, spiritual and social history of Germany in a way that, after careful consideration of everything, can be described only as fateful."
Hitler claimed that Jews were enemies of the Aryan race. He held them responsible for Austria's crisis. He also identified certain forms of Socialism and Bolshevism, which had many Jewish leaders, as Jewish movements, merging his anti-Semitism with anti-Marxism. Blaming Germany's military defeat on the 1918 Revolutions, he considered Jews the culprit of Imperial Germany's downfall and subsequent economic problems as well.
Generalising from tumultuous scenes in the parliament of the multi-national Austrian monarchy, he decided that the democratic parliamentary system was unworkable. However, according to August Kubizek, his one-time roommate, he was more interested in Wagner's operas than in his politics.
Hitler received the final part of his father's estate in May 1913 and moved to Munich. He wrote in Mein Kampf that he had always longed to live in a "real" German city. In Munich, he became more interested in architecture and, he says, the writings of Houston Stewart Chamberlain. Moving to Munich also helped him escape military service in Austria for a time, but the Austrian army arrested him finally. After a physical exam (during which his height was measured at 173 cm, or 5 ft 8 in) and a contrite plea, he was deemed unfit for service and allowed to return to Munich. However, when Germany entered World War I in August 1914, he petitioned King Ludwig III of Bavaria for permission to serve in a Bavarian regiment. This request was granted, and Adolf Hitler enlisted in the Bavarian army.

World War I

A young Hitler (left) posed with other German soldiers
Hitler served in France and Belgium as a runner for the 16th Bavarian Reserve Regiment (called Regiment List after its first commander), which exposed him to enemy fire. He drew cartoons and instructional drawings for the army newspaper.
Hitler was twice decorated for bravery. He received the Iron Cross, Second Class, in 1914 and the Iron Cross, First Class, in 1918, an honour rarely given to a Gefreiter. However, because the regimental staff thought Hitler lacked leadership skills, he was never promoted to Unteroffizier. Other historians say that the reason he was not promoted is that he was not a German citizen. His duties at regimental headquarters, while often dangerous, gave Hitler time to pursue his artwork. In 1916, Hitler was wounded in the leg but returned to the front in March 1917. He received the Wound Badge later that year. Sebastian Haffner, referring to Hitler's experience at the front, suggests he did have at least some understanding of the military.
On October 15, 1918, Hitler was admitted to a field hospital, temporarily blinded by a mustar gas attack. The English psychologist David Lewis and Bernhard Horstmann indicate the blindness may have been the result of a conversion disorder (then known as hysteria). Hitler said it was during this experience that he became convinced the purpose of his life was to "save Germany." Some scholars, notably Lucy Dawidowicz, argue that an intention to exterminate Europe's Jews was fully formed in Hitler's mind at this time, though he probably had not thought through how it could be done. Most historians think the decision was made in 1941, and some think it came as late as 1942.
Two passages in Mein Kampf mention the use of poison gas:
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At the beginning of the Great War, or even during the War, if twelve or fifteen thousand of these Jews who were corrupting the nation had been forced to submit to poison-gas…then the millions of sacrifices made at the front would not have been in vain.
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These tactics are based on an accurate estimation of human weakness and must lead to success, with almost mathematical certainty, unless the other side also learns how to fight poison gas with poison gas. The weaker natures must be told that here it is a case of to be or not to be.
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Hitler had long admired Germany, and during the war he had become a passionate German patriot, although he did not become a German citizen until 1932. He was shocked by Germany's capitulation in November 1918 even while the German army still held enemy territory. Like many other German nationalists, Hitler believed in the Dolchstoßlegende ("dagger-stab legend") which claimed that the army, "undefeated in the field", had been "stabbed in the back" by civilian leaders and Marxists back on the home front. These politicians were later dubbed the November Criminals.
The Treaty of Versailles deprived Germany of various territories, demilitarized the Rhineland and imposed other economically damaging sanctions. The treaty re-created Poland, which even moderate Germans regarded as an outrage. The treaty also blamed Germany for all the horrors of the war, something which major historians like John Keegan now consider at least in part to be victor's justice: most European nations in the run-up to World War I had become increasingly militarised and were eager to fight. The culpability of Germany was used as a basis to impose reparations on Germany (the amount was repeatedly revised under the Dawes Plan, the Young Plan, and the Hoover Moratorium). Germany in turn perceived the treaty and especially the paragraph on the German guilt as a humiliation. For example, there was a nearly total demilitarisation of the armed forces, allowing Germany only six battleships, no submarines, no air force, an army of 100,000 without conscription and no armoured vehicles. The treaty was an important factor in both the social and political conditions encountered by Hitler and his Nazis as they sought power. Hitler and his party used the signing of the treaty by the "November Criminals" as a reason to build up Germany so that it could never happen again. He also used the "November Criminals" as scapegoats, although at the Paris peace conference, these politicians had had very little choice in the matter.