In 1930 there were a lot of people who would have predicted that communism would be a major threat to the western way of life (including the communist themselves who had this as an openly avowed goal). The first “red scares” date to shortly after World War I and never went away as a concern for the religious, the small farmers, and the business elite. This fear of the communists would lead many to embrace or at least tolerate fascism on the grounds that it was a useful counterweight to the communists. No one up to the time that World War II started would have thought that next world war would have been fought against the fascists by both communists and the Anglo-Saxon world. Such an alliance would have been inconceivable to those who knew the level of hate and distrust between the ruling classes in the Anglo-Saxon World and the Soviet Union.
The people who predicted that communism would be a major threat to the Anglo-Saxon world were right. But those who sole matrix for looking at the world was communism and the huge threat it presented were often the most blind to dangers posed by the Nazis. Churchill was a famous exception this rule, but even he did not start warning about the rise of Germany until 1933. And his supposed fellow conservative Neville Chamberlain would write “The real danger to this country is Winston. He is the warmonger, not Hitler.” What is often forgotten is that Chamberlain way of looking at the world was the rule on the right and Churchill was exception. Conservatives by and large were blind to the threat posed by the Nazis because they feared communism so much.
Fast forward to today and many are obsessed with demographics and with good reason. There is no more sure guide to the future available to mankind then the study of demographics. We might not know how many people will die in the next 20 years, but we can say with a high degree of confidence what the maximum number of 20 year old can exist in 20 years time because those people will have been born today. And those numbers are so horrific for many countries that those who are aware of the numbers can’t stop thinking about them or interpreting everything they see in the light of those numbers. But there are more things that can profoundly change our world then just a free fall in the numbers of babies being born as bad as that can be over the long term.