People around the world need to take urgent action to protect the planet and all of its living in habitants, famed conservationist Jane Goodall told the TIME 100 Summit Tuesday.

“We have to get together and take action now,” Goodall said. “When hundreds, thousands, millions, and hopefully billions of us make ethical choices then we start moving toward a better world.”

Goodall, 85, has played a key role on the front lines of the conservation movement for decades. Her research gave the world new insight into primates, including discoveries such as how chimpanzees use tools in their everyday lives. She pioneered new ways of researching animals, including by living with them and using names to identify them.

“The way that I did this study was absolutely contrary to scientific norms at the time,” she said. “We were able to persuade science gradually to come out of this narrow reductionist way of thinking.”