*Fear for families and friends because of austerity
Fear for humanity and all wildlife because of climate change
Fear for the planet because of idiot politicians spending more on war than health and education
For those from war torn countries - all of the above plus losing their homes
Its really all rather depressing once you read information about the important issues facing us.*
But I can read and know about and be aware of all these things and I don't have anxiety about any of them. Whereas my SIL doesn't even get to that stage - she's so anxious about tiny, daily things (going to work and feeling bullied, dropping off her son at school and thinking people are judging her, going to the gym once and stopping because she's convinced everyone there is laughing at or judging her.)
I think real, diagnosable, anxiety is internally generated, it's a neurological condition, a chemical imbalance, as much as depression etc are. If you suffer from this condition, it goes looking for something (rational or not) to focus on - it might be a big thing, or a little thing. But it's the condition of anxiety that drives it, not the external "reason" for the anxiety.
I think we are so much more aware of it now and it is diagnosed rather than dismissing it as "nerves" (women) or being told to "man up" (men).