quiet-the-power-of-introverts-in-a-world-that-cant-stop-talking-susan-cain

survival strategy, and you need only
some, not all, of the traits to pull off
the strategy effectively.
There’s a great deal of evidence for
Aron’s point of view. Evolutionary biologists
once believed that every animal
species evolved to fit an ecological
niche, that there was one ideal set of
behaviors for that niche, and that species
members whose behavior deviated
from that ideal would die off. But it
turns out that it’s not only humans that
divide into those who “watch and wait”
and others who “just do it.” More than a
hundred species in the animal kingdom
are organized in roughly this way.
From fruit flies to house cats to
mountain goats, from sunfish to bushbaby
primates to Eurasian tit birds, scientists
have discovered that approximately
20 percent of the members of
many species are “slow to warm up,”
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