4
KOREA
Pleistocene, which began between 130,000 and 75,000 years ago, witnessed
the appearance of modern humans in East Asia. During subsequent cold
phases, sea levels in East Asia were much lower, transforming the Sea of
Japan into a huge lake that drained through what is the Korea Strait today.
This must have resulted in increased land areas, allowing people to move
among parts of East Asia. These prehistoric humans, however, may not be
directly related to modern Koreans. Archaeological evidence suggests that
humans, probably Palaeosiberians, also reached the Korean peninsula over
30,000 years ago. About 4,000–5,000 years ago, a different race started
to migrate from the north – probably north-eastern Siberia, Mongolia,
Manchuria and northern China – towards the Korean peninsula. It is believed
that these people were ancient Koreans or progenitors of Koreans. But, of
course, it cannot be ruled out that they may have exchanged their genes
with the ‘older’ inhabitants, although the majority of the latter may probably
have migrated further or have been driven into other areas outside the
Korean peninsula, i.e. north-eastern Manchuria and Japan. It thus seems
safe to conclude, contrary to what many Koreans would like to believe, that
the Korean people may be not racially completely homogeneous but
descendants of the various waves of migration from the north.
Some ancient Koreans settled in Manchuria and northern Korea, while
others ventured further down to southern Korea, and probably also across
the Korea Strait into Japan. (There is archaeological and linguistic evidence
for the continuity between Korea and Japan.) This domination by Koreans
of southern Manchuria and the Korean peninsula (then known as Chaoxian
in Chinese) was punctuated by Han China, which in an effort to assert its
power in these areas established four colonies (or commanderies) in northern
Korea and southern Manchuria. This period (108 bce to 313 ce) must have
been when Chinese culture, including the use of Chinese characters and the
emerging iron industry, started to make a real impact on the Korean tribal
states and their inhabitants, not to mention a certain amount of racial
intermingling between Koreans and Chinese. Following the demise of the
Chinese colonies, southern Manchuria and northern Korea were once
again left wide open for other ethnic groups (e.g. Korean and Tungusic)
to dominate.
By the fourth century ce, there had emerged a number of tribal states in
these areas, the most prominent ones being Kokuryo in southern Manchuria
(or the Liaodong region) and northern Korea, and Paekche and Shilla in
southern Korea. The territorial ambition and rivalry of these three kingdoms
led inevitably to a series of wars, and Shilla, albeit with aid from Tang
China, gained the upper hand and eventually ‘unified’ the three kingdoms in
668. Strictly speaking, however, this was not a complete unification, because,
although Paekche was fully incorporated into the Unified Shilla Kingdom,
most of Kokuryo’s territory was not. Only less than one-half of the combined
territories of the three kingdoms came under the control of Unified Shilla.