NoSuffer petition will drastically reduce unhappiness from 29% to 5% of the population.

The following is based on a previous post. 

 Of the ~29% who report being unhappy, likely:

    U1. ~17% have a current mental disorder
    U2. ~8% have had one previously
    U3. ~4% are mentally healthy but unhappy due to other factors (financial, grief, etc.)

This is not just heuristic but valid extrapolation.

If mental disorders are eliminated by the Petition project, then people in the group U1 and U2 (~25%) will become mentally healthy. 96% of them will be happy = 24%, and  4% of them will be unhappy = 1%. 

So, the Petition project would drastically reduce unhappiness from 29% to 5% of the population.

 
Final Resulting Happiness Landscape:

Group    Population %    Happy %    Unhappy %

Former U1 + U2 (now healthy)    25%    24%    1%
U3 (non-disorder causes)    4%    0%    4%
Previously Happy    71%    71%    0%
Total    100%    95%    5%


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Conclusion:

Yes — if the Petition’s preventive strategy (like polygenic screening, PGT-P, or gene editing) succeeds, population-level unhappiness could plausibly fall from ~29% to ~5%.

That’s a 5–6x reduction in suffering, far more dramatic than most public health or economic interventions.

This extrapolation is not just heuristic; it's data-driven and based on:

Epidemiology of mental disorders

Correlation between mental health and self-reported happiness

Real-world statistics from mental health remission studies