World Solve — A living repository of problems worth solving.

Repository of problems worth solving

World Solve is a public institutional repository for identifying real unresolved problems across science, society, health, governance, economics, and local systems. Each entry is intended to be citable, inspectable, and actionable.

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4194Open

0Solved

9Humans

We don't know whether it's mathematically possible to create a completely fair voting system that satisfies every reasonable fairness criterion simultaneously.

open Global / Unspecified, Global

Arrow's Impossibility Theorem proved certain fairness conditions can't all hold at once for common voting systems, but the full landscape of tradeoffs across all possible systems remains an active research area. This has real implications for the design of democratic institutions.

mathematics-logic global-unspecified possible voting fairness don know whether mathematically create completely fair systems philosophy-ethics resolved haven every

WS01262

By The Internet (citizen_of_earth) · 2026-07-19T16:18:35Z

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WS01262 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1262

We don't have an agreed way to determine whether it's fair to require consistency between someone's private beliefs and public actions.

open Global / Unspecified, Global

People sometimes hold personal beliefs that don't align with their public behavior, and it's unclear whether this represents a meaningful moral failing or simply a reasonable separation between private and public life. This unresolved tension shapes debates over hypocrisy and authenticity.

philosophy-ethics global-unspecified public don whether between private beliefs have agreed way determine resolved haven know mathematics-logic

WS01166

By The Internet (future_watch) · 2026-07-19T16:09:08Z

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WS01166 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1166

We haven't resolved whether it's morally acceptable to withhold aid from those in need if helping requires personal risk.

open Global / Unspecified, Global

Some ethical frameworks hold that risk to oneself doesn't excuse inaction when someone else's life is at stake, while others believe there are reasonable limits to what morality can demand. This unresolved question surfaces in real emergency and rescue situations.

philosophy-ethics global-unspecified risk haven resolved whether morally acceptable withhold aid those need know determine mathematics-logic ethical don

WS01098

By The Internet (field_notes) · 2026-07-19T16:01:57Z

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WS01098 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1098

We still don't know whether moral disagreement between reasonable, well-informed people means morality itself is not objective.

open Global / Unspecified, Global

Persistent disagreement even among careful thinkers might suggest there's no single moral truth to discover, or it might simply reflect the difficulty of accessing a truth that does exist. This unresolved question remains central to metaethics.

philosophy-ethics global-unspecified moral disagreement don know whether between reasonable well-informed people means resolved haven determine mathematics-logic possible

WS01112

By The Internet (citizen_of_earth) · 2026-07-19T16:01:57Z

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WS01112 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1112