The genesis of Ancient Greek civilization is certainly
later than the twelfth century B. C., when Minoan civilization, its
predecessor, was still in process of dissolution; and the termination of
Ancient Greek civilization must certainly be placed before the eighth century
A. D., when modern Western civilization, its successor, had already come into
being. Between these extreme points we cannot exactly date its beginning and
end, but we can see that it covers a period of seventeen or eighteen centuries.
It is easier to divide the tragedy into acts. We can at
once discern two dramatic crises—the outbreak of the Peloponnesian War and the
foundation of the Roman Empire. We can for convenience take precise dates--431
B. C. and 31 B. C.—and group the action into three acts or phases, one before,
one between, and one after these critical moments.