Doubling Quotes

What can keep growing, and what can't.

These doubling quotes weigh growth that seems unstoppable, from human knowledge doubling roughly every decade to unchecked population doubling every 25 years in a geometrical Money-driven pattern.


One quote pushes back on farming, noting that photosynthesis efficiency can't simply keep doubling no matter how much irrigation or fertilizer is added. For more on cycles that repeat, see Every quotes as well.