The Call of the Wild is a novella by American author Jack London published in 1903. The story takes place in the extreme conditions of the Yukon during the 19th-century Klondike Gold Rush, where strong sled dogs were in high demand. After Buck, a domesticated dog, is snatched from a pastoral ranch in California, he is sold into a brutal life as a sled dog. The novella details Buck's struggle to adjust and survive the cruel treatment he receives from humans, other dogs, and nature. He eventually sheds the veneer of civilization altogether and instead relies on primordial instincts and the lessons he has learned to become a respected and feared leader in the wild.

The Call of the Wild is London's most popular work and is considered the masterpiece of his so-called "early period." The novella is often classified as children's literature because of its animal protagonist, but the maturity of its subject matter makes it valuable for older audiences as well. Major themes include survival of the fittest, civilization versus nature, and fate versus free will.

The Yeehat, a group of Canadian aboriginal people portrayed in Call of the Wild, were a figment of London's imagination.

Gold was found in Alaska, the rush to obtain it required a strong constitution and many dogs to do the work that horses usually did in the states. Buck (a dog that is half St Bernard and half Shepherd) goes through many trials, and tribulations, finally realizing his potential. On the way, he learns many concepts from surprise, to deceit, and cunning; he also learns loyalty, devotion, and love. As he is growing, he feels the call of the wild.

John Griffith "Jack" London (born John Griffith Chaney, January 12, 1876—November 22, 1916) was an American author, journalist, and social activist. He was a pioneer in the then-burgeoning world of commercial magazine fiction and was one of the first fiction writers to obtain worldwide celebrity and a large fortune from his fiction alone. He is best remembered as the author of The Call of the Wild and White Fang, both set in the Klondike Gold Rush, as well as the short stories To Build a Fire, An Odyssey of the North, and Love of Life. He also wrote of the South Pacific in such stories as The Pearls of Parlay and The Heathen, and of the San Francisco Bay area in The Sea Wolf . London was a passionate advocate of unionization, socialism, and the rights of workers and wrote several powerful works dealing with these topics such as his dystopian novel, The Iron Heel and his non-fiction exposé, The People of the Abyss.

There is a patience of the wild—dogged, tireless, persistent as life itself—that holds motionless for endless hours the spider in its web, the snake in its coils, the panther in its ambuscade; this patience belongs peculiarly to life when it hunts its living food;and it belonged to Buck as he clung to the flank of the herd, retarding its march, irritating the young bulls, worrying the cows with their half-grown calves, and driving the wounded bull mad with helpless rage.

“To this day Jack London is the most widely read American writer in the world,” E. L. Doctorow wrote in The New York Times Book Review. Generally considered to be London's greatest achievement, The Call of the Wild brought him international acclaim when it was published in 1903. His story of the dog Buck, who learns to survive in the bleak Yukon wilderness, is viewed by many as his symbolic autobiography. "No other popular writer of his time did any better writing than you will find in The Call of the Wild,” said H. L. Mencken. "Here, indeed, are all the elements of sound fiction."