Your Brain Hasn't Changed in 30,000 Years. But Your World Has. | Why We Can't Switch Off

takeaways

1. Dr Shadi Harrison argues that our brains are essentially the same as those from 30,000 years ago, creating a mismatch between our 'Stone Age' hardware and a world of constant digital stimulation.

2. The nervous system needs sustained periods of rest across the day rather than brief 5-minute 'moments' of breathwork or meditation, which she sees as shortchanging the body.

3. Poor choices compound over time in a domino effect: overwhelming input leads to worse sleep, food and exercise decisions, which erode self-esteem and further decision-making.

4. She reframes struggle as an environmental rather than personal problem, removing shame, and advocates starting small (e.g. waiting 5 minutes before reaching for the phone) because brains dislike change.

5. Boredom and 'white space' with nothing to do are described as necessary for creativity, deep thinking and the brain's best work — the reason ideas often arrive in the shower.

6. Harrison shares her own routine: no external input for the first 60 minutes of the day and phone plugged away from 7pm to 7am, treating life as clearly 'on' or 'off'.

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