Why does the brain mostly remember tragic, bad or embarassing memories instead of the happy ones

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Why does the brain mostly remember tragic, bad or embarassing memories instead of the happy ones

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I’m assuming it’s because they made a bigger impact on the mental. Like a wound leaving a scar. But you’re not alone, I can remember every stupid thing I’ve ever done. Have to dig deep for the good ones.

So you don’t repeat them. You remember stupid shit you did way more than fine/normal/good stuff you did cause you don’t want it to happen again, if you forget, you will make the same mistake. You dislike feeling bad and embarrassed so you want to minimises doing that to yourself again.

Survival strategy, basically evolution has meant that anything that was dangerous, bad or even socially embarrassing and how the situation was dealt with is important so you can avoid a similar issue next time.

Evolutionary benefit. Evolutionary benefit. Evolutionary benefit. Evolutionary benefit. Evolutionary benefit. Evolutionary benefit. Evolutionary benefit. Evolutionary benefit.

This is called negativity bias. As others have pointed out it likely serves an evolutionary benefit. You can go on a hike and for 99.99% of the time, you were enjoying the good weather and views but afterwards you’ll focus on the 0.01% of the time where you almost got bit by a venomous snake and that will define the trip. It makes us more prepared for the future.
Research says that this tends to disappear as we age and we can even lean towards a positivity bias.