The official teaching on "what about countries were the majority have not heard?" (which, as far as I know, has not changed since then) :
*** w52 6/1 pp. 344-345 Fixing Destinies in This Judgment Period ***
COMMUNITY RESPONSIBILITY
13 In view of the eternalness of the destruction of those slain by
Jehovah at Armageddon, some will ask about those who may not
personally hear the message, especially in some lands that prohibit
the witness work. In addition to family responsibility the Bible shows
a communal or community responsibility, where a community upholds or
goes along with rulers that persecute Jehovah’s people or are
otherwise wicked. Did not the Egyptians suffer plagues because of
Pharaoh’s hardness? (Ex. 5:1, 2; 9:13-16) Did not the Amalekites
suffer for generations afterward because of Amalek’s opposition to
Israel in the wilderness? (Ex. 17:8, 14, 16) King Saul brought trouble
on Israel years after his death. (2 Sam. 21:1) David’s sins brought
punishment upon the people. (2 Sam. 12:10-23; 24:10-17) Some relate
some of this to ruler punishment rather than community responsibility,
but it does show how the sins of one can affect many. It was
unquestionably community responsibility when Achan trespassed and
brought a military defeat on Israel. (Josh. 7:5, 13-21) Wicked men
brought destruction upon the entire city of Gibeah, and those who
supported Gibeah or merely refrained from helping punish her suffered
with her. (Judg. 19:22-30; 20:40; 21:9, 10) Because King Jehoram of
Judah deflected from God the nation went wrong and was punished. (2
Chron. 21:11-15) If idolatry started in a city in Israel and corrupted
the inhabitants the city was destroyed. And other examples could be
given. (Gen. 12:17; 20:9, 17; 26:10; Deut. 13:12-18) Matthew 10:14,
15, 23 shows households or cities that are unreceptive to the message
will find judgment day unendurable. The principle applies on a
national scale also.
14 The people must accept responsibility for the nation’s acts. If the
government becomes too oppressive against them they oust it, by either
ballots or bullets. But wickedness against God they placidly tolerate.
To them personal convenience and liberty are more precious than
godliness. They revolt from harsh rulers, but support godless ones.
They lack the burning love for righteousness and the devouring hate
for wickedness that would consume the corruption and immorality now
rampant in all human governments. Rulers and ruled wallow in the
trough of an international moral breakdown. (2 Tim. 3:1-5) Nations
operate according to the principle of community responsibility. Rulers
may start wars, but the people fight them. It is upon the people
generally, young and old, male and female, that the enemy nation rains
destruction, and not upon the wicked rulers. The nations in their wars
sow death on the basis of community responsibility. Will it not be
just for them to reap it on the same basis at Armageddon? Can they
rightly complain if they reap as they sow, are judged as they judged,
are shown the same mercy they showed? If the people either actively or
passively support what is corrupt and immoral and murderous, do they
not bear some responsibility therefor?—Matt. 5:7; 7:1, 2; Gal. 6:7;
Jas. 2:13.