“Rather than living as aggregations of families in nomadic bands, as modern hunter-gatherers do, the first humans probably lived like savanna baboons.”
The Origin of Humankind (1994)
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Richard Leakey 39
Kenyan paleoanthropologist, conservationist, and politician 1944Related quotes

“I'd rather live in the gutter embracing reality than live like a king embracing unreality.”
http://groups.yahoo.com/group/cerebus/message/104999

"Essay on the Biological Sciences" in Good Reading (1958)
Context: If we have been slow to develop the general concepts of ecology and conservation, we have been even more tardy in recognizing the facts of the ecology and conservation of man himself. We may hope that this will be the next major phase in the development of biology. Here and there awareness is growing that man, far from being the overlord of all creation, is himself part of nature, subject to the same cosmic forces that control all other life. Man's future welfare and probably even his survival depend upon his learning to live in harmony, rather than in combat, with these forces.

Source: Zero Gravity interview (2006), p. 90

Quarterly Review, 156, 1883, p. 570
1880s

Source: Seriously... I'm Kidding