55% sureLots of sources credit Jane Goodall with this, and they agree with each other. The book or the speech it first came from hasn't turned up yet.
What turned up
Reported in Brad Dunn, When They Were 22 (2006), p. 51 — a secondary biographical compilation reporting her words, not her own book or a transcribed interview.
Work
When They Were 22: 100 Famous People at the Turning Point in Their Lives
Occasion
2006 · childhood recollection, as reported
Sources checked
en.wikiquote.orgChecked using claude-sonnet-5, 21 August 20262000s section, reported in When They Were 22 (2006), p. 51
Nothing made from these words yet — Storyfaire is where they get made.