Even though that book came out in the 40s, the thought of not having children because Armageddon was so close was still prevelant in the early 60s. I remember how the Society used to paint a bleak picture for anyone with kids or babies and having to deal with them during the Great Tribulation.
It was enough to scare me...a little kid. I went through my entire childhood fearing the day Armageddon was to start and having to flee our home and hide in the woods and I bought into the prayer that it not befall us during winter. When I got old enough to think about marriage, it had influenced me enough to not want kids.
Later, in the 80s, the Society tried pushing that thought again...and met with some resistance. That was the one time that I actually experienced more than a few people speak against the counsel from the Society. The dubs will buy the Armageddon bit, the 1914 bit, the Discreet Slave bit, but mess with people's natural desire to have children and they done gone too far...