The Descent of Man

also Broca (tr.) in 'Anthropological Review,'
Oct. 1868, p. 410.) It differed, therefore, from
the quaternary race of the caverns of Belgium.
Man can long resist conditions which appear
extremely unfavourable for his existence. (31.
Dr. Gerland, 'Ueber das Aussterben der Naturvolker,'
1868, s. 82.) He has long lived in the
extreme regions of the North, with no wood for
his canoes or implements, and with only blubber
as fuel, and melted snow as drink. In the
southern extremity of America the Fuegians
survive without the protection of clothes, or of
any building worthy to be called a hovel. In
South Africa the aborigines wander over arid
plains, where dangerous beasts abound. Man
can withstand the deadly influence of the Terai
at the foot of the Himalaya, and the pestilential
shores of tropical Africa.
Extinction follows chiefly from the competition
of tribe with tribe, and race with race. Various
checks are always in action, serving to keep