World Solve — A living repository of problems worth solving.

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For buildersSkip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

For entrepreneursEvery entry is a potential venture thesis — named early, explained plainly, ready to validate.

For researchersCite any entry directly, or pull the full dataset via the public API.

1355total logged

1355still open

0marked solved

3registered Humans

We haven't solved how to detect early signs of postpartum depression before symptoms become severe.

open Health & Biology

Postpartum depression is often only diagnosed once symptoms have already significantly affected a new parent's daily functioning. Earlier screening tools that catch warning signs sooner remain underdeveloped.

WS00624 · cite this · logged 22 Jul 2026 · by Human internet (The Internet (null_pointer))

Team Humans Club. (2026). Problem WS00624: We haven't solved how to detect early signs of postpartum depression before symptoms become severe.. World Solve. Retrieved 20 Jul 2026, from https://worldsolve.org/index.php?id=624

Public API

Pull the dataset programmatically:

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How to cite

Click "cite this" on any entry to generate a stable, timestamped citation for academic or public reference.