Man is an animal. The upshot of the modern body of work called
ethology, of Lionel Tiger, Robin Fox, Konrad Lorenz, and a host of
others, is that it reminds us of the basic human condition: that
man is first and and foremost an animal moving about on a planet
shining in the sun. Whatever else he is, is built on this. The argu-
ment of these people is that we shall never understand man if we
do not begin with his animal nature. And this is truly basic. The
only certain thing we know about this planet is that it is a theater
for crawling life, organismic life, and at least we know what or-
ganisms are and what they are trying to do.
At its most elemental level the human organism, like crawling life,
has a mouth, digestive tract, and anus, a skin to keep it intact, and
appendages with which to acquire food. Existence, for all organis-
mic life, is a constant struggle to feed — a struggle to incorporate
whatever other organisms they can fit into their mouths and press
down their gullets without choking. Seen in these stark terms, life
on this planet is a gory spectacle, a science-fiction nightmare in
which digestive tracts fitted with teeth at one end are tearing away
at whatever flesh they can reach, and at the other end are piling up
the fuming waste excrement as they move along in search of more
flesh.