Problems that Have Been Solved Already

While it is easy to focus on ongoing crises, the last 100 years have also seen massive, existential problems successfully solved or mitigated through technology, organized movements, and effective policy.

1. The Ozone Layer Depletion

• The Problem: Chlorofluorocarbons (CFCs) were actively destroying the Earth's ozone layer, threatening to expose the surface to lethal levels of UV radiation.
• The Solution: The 1987 Montreal Protocol united global governments to ban CFCs. The ozone layer is now actively healing and on track to fully recover.

2. Mass Neurological Poisoning (Leaded Gasoline)

• The Problem: The addition of tetraethyllead to gasoline was causing a massive, invisible epidemic of lead poisoning, severely impacting human cognitive development and driving up violent crime rates globally.
• The Solution: Regulatory bans on leaded gas (phased out in the US by the 1990s) caused childhood blood-lead levels to plummet and correlated with a massive drop in global crime.

3. The Eradication of Smallpox and Mitigation of Polio

• The Problem: Smallpox killed hundreds of millions of people over centuries, and Polio paralyzed hundreds of thousands of children annually in the mid-20th century.
• The Solution: A globally coordinated vaccination and containment effort entirely eradicated Smallpox by 1980. Polio has been eliminated in the vast majority of the world.

4. The Threat of Total Deforestation

• The Problem: In the 1980s, popular consensus (fueled by Earth Day specials) projected that the world's trees would be completely wiped out by the time children reached adulthood.
• The Solution: Trees still exist. A combination of shifts in the paper/timber industry, large-scale replanting efforts, and protected environmental zones not only halted total deforestation but actually increased net tree coverage in many developed regions.

5. Extreme Atmospheric Pollution (Acid Rain)

• The Problem: Sulfur dioxide and nitrogen oxides from power plants were turning rain highly acidic, destroying forests, lakes, and infrastructure across North America and Europe.
• The Solution: A market-based cap-and-trade system under the 1990 Clean Air Act amendments incentivized companies to install "scrubbers," drastically reducing emissions and effectively ending the acid rain crisis.

6. The Epidemic of Child Labor

• The Problem: In the early 1900s, children were routinely exploited in factories, mines, and mills under brutal, highly dangerous conditions.
• The Solution: Massive, organized labor movements and subsequent legislation (like the Fair Labor Standards Act of 1938) established minimum ages and maximum hours, ending systemic industrial child labor in developed nations.

7. Global Mass Starvation (The Green Revolution)

• The Problem: In the mid-20th century, rapid population growth led experts to predict unavoidable, catastrophic global famines that would kill hundreds of millions.
• The Solution: Agronomists like Norman Borlaug engineered high-yielding, disease-resistant crop varieties (particularly wheat) and revolutionized fertilizer use, credited with saving over a billion people from starvation.

8. Uncontrolled Spread of HIV/AIDS in the Developed World

• The Problem: In the 1980s and 90s, the AIDS epidemic was an active death sentence spreading rapidly with no cure.
• The Solution: Massive public health campaigns, combined with the rapid technological development of antiretroviral therapies (ART), turned a fatal epidemic into a highly manageable chronic condition.

9. Epidemic of Mesothelioma (Asbestos)

• The Problem: Asbestos was used in almost all construction materials, leading to an epidemic of lethal lung diseases and mesothelioma.
• The Solution: The scientific exposure of asbestos toxicity led to strict environmental bans and mass abatement programs, fundamentally changing how building environments are regulated for human safety.

10. The American Dust Bowl

• The Problem: In the 1930s, severe drought combined with poor, aggressive farming techniques stripped the topsoil of the US plains, causing apocalyptic dust storms that choked cities and destroyed agriculture.
• The Solution: The government intervened to teach soil conservation techniques (crop rotation, terracing) and planted massive "shelterbelts" of trees to block wind, permanently changing agricultural practices and halting the ecological collapse.

11. Regional Ecological Collapse (Chesapeake Bay)

• The Problem: The Chesapeake Bay, one of the most vital estuaries in the US, was dying from severe nutrient pollution, agricultural runoff, and overfishing.
• The Solution: Targeted, multi-state regulatory frameworks and localized community efforts massively reduced nitrogen and phosphorus pollution, leading to a profound, ongoing restoration of the local ecosystem.

12. Airborne and Waterborne City Plagues

• The Problem: Just over 100 years ago, cholera, typhoid, and dysentery were major, routine killers in densely populated cities due to poor sanitation.
• The Solution: The universal adoption of municipal water chlorination and modern sewage treatment infrastructure virtually entirely eliminated these diseases from the developed world.

Problems Solved Between 2006 and 2026

The last two decades have seen exponential leaps in technological and scientific problem-solving, dramatically shifting what humanity assumes is possible:

13. The Cost and Viability of Accessing Space (Reusable Rockets)

• The Problem: Prior to the 2010s, accessing space was prohibitively expensive because every orbital rocket was discarded after a single launch.
• The Solution: The successful engineering and routine landing of orbital-class boosters (pioneered by SpaceX) drove down the cost per kilogram to low Earth orbit by orders of magnitude, effectively solving the economic chokepoint of space exploration and satellite deployment.

14. 50-Year Biological Mystery: The Protein Folding Problem

• The Problem: For half a century, predicting the three-dimensional structure of a protein from its amino acid sequence was considered an almost insurmountable computational challenge in biology.
• The Solution: In 2020, artificial intelligence (specifically DeepMind's AlphaFold) effectively solved the problem, accurately predicting the structures for nearly every catalogued protein known to science, fundamentally revolutionizing drug discovery.

15. The Unscalability of Renewable Energy

• The Problem: In 2006, solar and wind power were vastly more expensive than fossil fuels, requiring heavy government subsidies just to exist as fringe alternatives.
• The Solution: Through massive manufacturing scale and technological iteration (Wright's Law), the cost of solar dropped by roughly 90%. By 2026, solar and wind became the cheapest forms of newly installed electricity generation on Earth, solving the economic viability of the renewable transition.

16. Rapid Vaccine Generation (mRNA Technology)

• The Problem: Historically, creating a safe and effective vaccine for a novel pathogen took years or even decades of trial and error.
• The Solution: The rapid, successful deployment of mRNA technology proved that a vaccine could be computationally sequenced and physically developed in a matter of days or weeks, changing global pandemic response capabilities forever.

17. The Inability to Cure Genetic Diseases (CRISPR)

• The Problem: Genetic diseases (like Sickle Cell Anemia) were considered lifelong, untreatable conditions managed only through pain relief and blood transfusions.
• The Solution: The 2012 discovery and rapid refinement of CRISPR-Cas9 allowed for cheap, precise gene editing. By 2023, the first CRISPR therapies were globally approved, officially moving humanity into an era capable of functionally curing genetic diseases.

18. The Prevention of Malaria

• The Problem: Malaria has killed millions of people over millennia, historically evading a functional vaccine due to the complexity of the parasite.
• The Solution: Between 2021 and 2024, the WHO recommended the first two safe and highly effective malaria vaccines (R21/Matrix-M and RTS,S/AS01), formally providing a scientific solution to one of humanity's oldest plagues.