18 challenges · 7 categories · 1 century
The Biggest Problems
We Must Solve
Humanity's greatest unsolved challenges for the 21st century. The problems that matter most — for the future of all life on Earth.
18
Total Challenges
7
Categories
18
Showing
Why This Matters
The 21st century is a hinge point in human history. We have more power to shape the future than ever before — and more at stake. Climate change, artificial intelligence, nuclear threats, and pandemics don't respect borders. They require coordination, ingenuity, and collective action at unprecedented scale.
This site catalogues the grand challenges where progress could mean the difference between a thriving civilization and a diminished one. Each is solvable — if enough brilliant people decide to work on them.
18
Grand Challenges
7
Categories
100
Years Left