"Increasingly Uncertain World"

I read this phrase quite a lot in the last week. I don't think it really means what people who're saying think it means, though. Is the world really more uncertain than it was, say, 90 years ago? Not really (and you know I picked that particular figure because it landed right in the middle of WWI), with advances across all areas of life people (in this country) now live longer and have far better medical support than they did then. Communication has improved to the level where the speed of light is the principal limit to how fast you can find out what is going on elsewhere in the world - there is more certainty now than there has ever been in the past. the problem is that what has replaced ignorance is the certainty that there are many things and people around the world that can threaten us.