Turns out humans were engineered to focus on threats to our well-being – the cave dwellers had to worry about staying alive not their smartphones.

But, smartphones work the same way an animal threatening our life does by awakening our fight or flight instincts – causing anxiety, depression and fatigue.

So, the author Amit Sood says “there were unique compromises our ancestors had to make when evolving.”

Today we are less worried about animals killing us in our cave but still concerned about crime – concern and being faced with having to act are two different things.

Over the millennia, expecting the worst (the “negativity bias”) causes our brains to wander and discount the good things in our lives.

That tires us out and makes us walk around with a fatigued brain.

Time to get off our own cases and understand that we’re simply fighting the way we were programmed to survive in the beginning.

Today we can show gratitude, live in the present and choose the things that make us happy to counterbalance the “negativity bias”.