SCIENCE: I thought I'd share a little bit of info which I tell students in the positive mindset workshops I do. Understanding this might help you gain a bit of relief and perhaps put some perspective in place when negative thoughts are heavily clouding your happiness.
When we were hunter gatherers the average age of death was 30yrs old, that's because so many kids died before they reached the age of 15 so it brought the average right down. But you could have lived to 60yrs if you'd been really, really good at one thing: focussing on negative situations.
Being hyper aware of negatives like the threat of starvation, violence and disease (the 3 biggest killers) meant that you were more like