“90% of everything is crud/crap.” — Theodore Sturgeon

What is Sturgeon’s Law?

Sturgeon’s Law, also called Sturgeon’s Revelation, is an aphorism coined by science fiction writer Theodore Sturgeon. He first stated it in 1951 in defense of science fiction against critics who claimed that 90% of everything is bad, not just science fiction.

The law is less a pessimistic verdict on quality and more a calibration tool: given any large body of work, ideas, or output, the majority will be mediocre. That’s not a bug — it’s a baseline.

Key Ideas

• The 90% is the cost of the 10%. Mediocrity is the price of volume. You can’t reliably produce the outstanding without wading through a lot of ordinary.
• It applies universally. Books, films, music, ideas, blog posts, startups, advice, scientific papers — no domain is exempt.
• It’s not an excuse to quit early. The 10% exists. Your job is to find it, create it, or become it.
• Quantity enables quality. ¹ The one percent rule and deliberate output over time are how the excellent surfaces from the noise.

Implications

• Don’t judge a field by its noise floor. Critics who dismiss entire genres, disciplines, or communities are usually only seeing the 90%. Dig deeper before concluding.
• Filter ruthlessly. This is the core argument for a Low Information Diet and News Sobriety — most content does not add signal.
• Stay humble as a creator. Most of your own output will be in the 90%. That’s okay. Ship consistently and let the excellent emerge over time.

99% of effort is wasted

Do great work