World Solve

Countries with opt-out organ donation systems tend to have far higher donation rates, saving more lives, but implementing this fairly and ethically worldwide remains politically and culturally difficult.

Cooling saves lives during extreme heat, but most air conditioners rely on energy sources and refrigerants that contribute to climate change. A low-emission cooling solution accessible to poorer regions remains urgently needed.

Raising cattle and other livestock produces a significant share of global methane emissions, yet meat remains a major part of diets worldwide. A lower-emission farming method that doesn't require giving up meat entirely remains unsolved.

Sending money internationally is often slow, expensive, or restricted depending on where you live, despite living in a supposedly connected digital economy. A truly borderless payment system remains unbuilt.

A single serious lapse can overshadow a lifetime of otherwise decent conduct, and it remains unresolved how heavily isolated failures should weigh against consistent character. This tension shapes public judgment of both public figures and people in our personal lives.

Genuine empathy is often praised as essential to moral understanding, but it's unclear how much true empathy is even possible without any lived proximity to another's specific suffering. This unresolved tension complicates how we approach compassion across vastly different life experiences.

Philosophers have proposed countless theories of meaning, from pleasure to purpose to relationships, but no single account has settled the question. This affects how people choose to live and what they consider worth pursuing.

Decisions about climate change, resource use, and debt all require some answer to how much weight future, non-existent people deserve compared to those who exist now. Philosophers disagree sharply on this tradeoff.

Utilitarian arguments often justify this tradeoff by pointing to lives saved, while animal rights perspectives reject using sentient beings purely as means to human ends. This unresolved tension remains central to biomedical ethics.

Governments regularly allocate more resources and protection to their own citizens, but the philosophical justification for this unequal treatment of moral worth remains contested. This unresolved question underlies debates on immigration and international aid policy.

Policy decisions often implicitly require comparing the value of different lives, such as in healthcare rationing, yet no philosophical framework has fully justified how such comparisons should be made. This unresolved question has real consequences in medical ethics.

Judging historical figures by modern values can feel necessary for moral clarity, but it also risks ignoring the very different context they lived in. This unresolved tension continues to shape debates over monuments, legacies, and historical memory.

Drone delivery has been tested in various cities, but noise, safety concerns, and airspace regulation have kept it from becoming a mainstream, everyday urban service. Solving these combined challenges remains an ongoing barrier.

Video streaming quality can noticeably degrade during peak usage times even with a stable internet connection, since network congestion affects delivery regardless of a household's own bandwidth. Solving this at scale remains an unresolved infrastructure challenge.

Most human knowledge lives in systems vulnerable to disaster, conflict, or simple neglect, with no single resilient backup for civilization's collective information. A well-protected global archive could safeguard this against permanent loss.

The first hours after a disaster are often the most critical for saving lives, yet aid frequently takes days to arrive due to logistics and coordination failures. Closing this gap could save many lives that are currently lost to delay alone.

Many real-world problems, like planning delivery routes or scheduling, become exponentially harder to solve exactly as they grow in size. Faster methods for these problems could save enormous time and resources across industries.

Different cultures, religions, and individuals define meaning and purpose in very different ways, with no way to prove one view more correct than another. This makes questions about how to live well deeply personal rather than settled.

Rising demand keeps pushing housing costs higher in growing cities, pricing out the very workers those cities depend on. Making urban growth compatible with affordability remains an unresolved policy challenge nearly everywhere.

Some cancers are caught early and treated successfully, while others are found too late simply because no cheap, accurate screening exists for them. Broader early detection could save far more lives than treatment breakthroughs alone.