510
CHAPTER
TWENTY-EIGHT:
white
settlers.
Ships
could
not
sail
up
its
rivers,
for
their
navigation
was
blocked
by
bars across their
mouths
or
by
cataracts
not far
above.
Not
until
the middle of the
nineteenth
century
did
white
men
pene-
trate
its vast interior. The
great
pioneer
was
David
Livingstone,
the
Scot
who went to South
Africa
as
a medical
missionary
and in a
few
years
became
an
explorer
whose
name
and fame
flew round
the
world.
Such
was
the
widespread
interest
in his work
that
when he was
thought
to
be
lost
the New York
Herald sent
Henry
M.
Stanley
to
find him.
Many
months
later,
in
1871,
the
young
traveler
encountered
the
veteran
by
Lake
Tanganyika
and
greeted
him
with "Dr.
Livingstone,
I
presume?"
This
was the
introduction
of the man
who
soon
proved
to
be the most successful
of
all the
explorers
of central
Africa.
Stanley's
expedition through
the
Congo
region
from 1874 to
1877,
under
the
joint auspices
of the
proprietors
of
the New York
Herald
and the
London
Daily
Telegraph, accomplished
more
than
any
other
single
exploring
expedition
in
the continent.
By
the
beginning
of the
last
quarter
of
the
century
the
interior of Africa was at last
becoming pretty
well known
to the western
world,
and
enough
of the
potential
wealth
of the
continent was revealed
to
make it
attractive
to
Europeans.
By
this
time, also,
science was
making
Africa
less
forbidding
to
white
men.
They
could now live there more
safely,
thanks
to
new
medical
knowledge;
and
the
progress
of
engineering pointed
the
way
for
them
to
exploit
the
natural
resources of the
interior
with
the
aid of
native
labor.
Moreover,
as
already
suggested,
the
growth
of
industrial
society
on the continent of
Europe,
which
had
lagged
far
behind that
of
Britain,
was
finally
approaching
the
stage
where it felt an
urgent
need
for
new
markets
and
new
sources
of
raw
materials.
Furthermore,
according
to western
standards,
Africa was
a
political
vacuum.
But
even when we have
taken
into
account all the
above
conditions,
we
have
yet
to
explain
why
European powers
rushed
in
to fill the
vacuum.
The
impelling
force was
of the same
nature
as the
vacuum.
It
was
political.
It
was
nationalism,
not
just
economic
nationalism.
Europe
was tense
with
it,
and
Britain
unconsciously
encouraged
it.
She
was
the
only
world
power,
and
continental
nations
envied her
proud posi-
tion.
They
generally
attributed it to her
industrial
supremacy
and
her
imperial possessions.
Her
example
therefore
stimulated
them
to de-
velop
their
own
industries
as
rapidly
as
possible
by
means
of
protective
tariffs,
which
only
intensified
their
national
rivalries,
and to
acquire
colonies,
in
which
pursuit
their
own
economic
nationalism
spurred
them
along.
As the
nations
on
the
continent
adopted
protection
to