Henry Joseph Darger Jr. was born on April 12, 1892, in Chicago, where he was raised by his disabled father. As his father's health deteriorated, Darger faced a tumultuous childhood, marked by frequent fights and ultimately being placed in a charity home. In 1904, he was sent to a children's asylum in Lincoln, Illinois, officially due to issues related to his behavior. Following the death of his father in 1908, Darger made several escape attempts, finally succeeding in 1910 when he walked much of the way back to Chicago.
Throughout his adult life, Darger worked menial jobs in various hospitals, with a brief interruption for military service in the U.S. Army during World War I. Living in poverty, he became a recluse in his later years, spending much of his time in his apartment. A devout Catholic, he attended Mass multiple times daily and collected religious memorabilia. In 1963, chronic pain forced him into retirement, and he was moved to a charity nursing home in late 1972, shortly before his death on April 13, 1973.
It was during this transition that his landlords, Kiyoko and Nathan Lerner, discovered Darger's extensive body of artwork and writings, which he had kept hidden for decades. From the early 1910s to the late 1930s, he crafted the monumental fifteen thousand one hundred forty-five-page novel, In The Realms of the Unreal, which narrates a rebellion of child slaves on a fantastical planet. The story features the Vivian Sisters, seven princesses who battle against the enslaving Glandelinians, drawing inspiration from the American Civil War and martyrdom tales.
Darger also produced collages and paintings, often depicting little girls in combat, sometimes in unsettling contexts. His artistic style evolved over time, with some works exceeding ten feet in length. Other notable writings include an unfinished sequel to his main novel, a decade-long weather journal, and an autobiography titled The History of My Life, which details a fictional tornado's destruction in Illinois.
Despite never seeking publication, Darger's work gained recognition posthumously and is now celebrated within the outsider art movement. His art is housed in numerous museum collections, including the American Folk Art Museum in New York City and the Intuit Art Museum in Chicago. Initial analyses of his work often took a psychoanalytical approach, focusing on the recurring themes of nude and brutalized children, leading to various hypotheses about his psychological state.