Jane Goodall went to Gombe in 1960 because paleoanthropologist Louis Leakey believed that studying wild chimpanzees could unlock secrets about human evolution. Leakey had spent years excavating ancient hominin fossils in East Africa, and he became convinced that observing our closest living relatives in their natural habitat would help him understand how those ancient ancestors actually behaved. On July 14, 1960, a 26-year-old Goodall stepped onto a pebble beach along Lake Tanganyika in what was then the British territory of Tanganyika (now Tanzania) to begin what would become one of the most important field studies in scientific history.
Louis Leakey’s Theory About Human Origins
Leakey was already famous for his fossil discoveries at Olduvai Gorge when he began thinking about a problem fossils alone couldn’t solve. Bones and stone tools could tell him what early humans looked like and what they made, but they couldn’t reveal how those ancestors moved through their social world, raised their young, or found food. Leakey hoped that studying living apes would shed light on the behavior of fossil apes such as Proconsul, an extinct primate he considered a key piece of the evolutionary puzzle.
His reasoning was straightforward: if chimpanzees and humans share a common ancestor, then behaviors shared by both species likely existed in that ancestor too. By documenting what wild chimps actually did, day after day, Leakey believed researchers could build a behavioral picture of early human life that the fossil record simply couldn’t provide. He eventually sent three women into the field to study each of the great apes. Goodall got chimpanzees, Dian Fossey got mountain gorillas, and Biruté Galdikas got orangutans. The trio became known as “Leakey’s Angels.”
Why Gombe Specifically
Gombe Stream was a small game reserve on the eastern shore of Lake Tanganyika, tucked into steep forested valleys that ran down to the water. It was remote, difficult to access, and home to a population of wild chimpanzees that had little contact with researchers. That isolation was exactly the point. Leakey wanted observations of chimps living undisturbed lives, not animals already habituated to human presence or altered by nearby settlements. The reserve’s compact size (only about 35 square kilometers) also made it possible for a single researcher to track chimpanzee groups on foot over time.
How Goodall Got There
Goodall had no university degree when Leakey chose her for the project. She had worked as his secretary and assistant in Kenya, and he saw her patience, curiosity, and lack of academic preconceptions as assets rather than limitations. He believed someone without formal training would observe chimpanzee behavior without the biases that scientific orthodoxy might impose.
Leakey secured six months of funding from the National Geographic Society. That was all. If Goodall didn’t produce meaningful results quickly, the money would dry up. British colonial authorities, still governing Tanganyika at the time, refused to let a young woman go into the wilderness alone. They required a companion, so Goodall’s mother, Vanne, accompanied her to Gombe for those first critical months.
Discoveries That Justified the Mission
Leakey’s gamble paid off faster than anyone expected. Within months of her arrival, Goodall observed a chimpanzee she had named David Greybeard stripping leaves from a twig and inserting it into a termite mound to fish out insects. This was tool use, and more than that, it was tool making. The chimp had modified a natural object for a specific purpose. At the time, the ability to make tools was considered the defining trait that separated humans from all other animals.
When Goodall reported the finding to Leakey, his response became one of the most quoted lines in primatology: “Now we must redefine tool, redefine Man, or accept chimpanzees as humans.” The discovery forced scientists to rethink what made humans unique and validated Leakey’s entire hypothesis that living apes held clues to the human story.
Goodall’s observations kept rewriting textbooks. She documented chimpanzees hunting and eating meat, overturning the prevailing assumption that they were herbivores. She watched them form complex social alliances, wage territorial conflicts, and show what looked unmistakably like grief and affection. Each finding added another layer to the behavioral portrait Leakey had hoped she would paint, and each one suggested that the gap between humans and other primates was far narrower than science had assumed.
From Six Months to Six Decades
What began as a half-year project with uncertain funding became the longest-running study of wild animals ever conducted. The National Geographic Society continued its support after Goodall’s early breakthroughs made international headlines, and the research station at Gombe grew from a single tent into a permanent field site. Goodall eventually earned a Ph.D. from Cambridge, one of very few people admitted to a doctoral program without first completing an undergraduate degree.
Gombe Stream Game Reserve was upgraded to Gombe Stream National Park in 1968, partly because of the global attention Goodall’s work brought to the area. Researchers have now been collecting continuous data there for more than 60 years, tracking multiple generations of chimpanzee families. That long timeline has revealed patterns no short study could capture: how mothers shape their offspring’s personalities, how male chimps rise and fall in social hierarchies over decades, and how disease and habitat loss threaten the population’s survival.
Leakey’s original question, whether chimpanzees could teach us about our own origins, turned out to be even more productive than he imagined. The Gombe data has informed fields ranging from psychology to medicine to conservation biology, all because one paleoanthropologist looked at his fossils and realized he needed a living window into the past.