Thresholds of Complexity
Scale (Time & Space)
Claim Testers (How Do We Know?)
100

The first threshold of Big History, which took place 13.8 billion years ago

 What is the Big Bang?

100

The approximate age of the universe in billions of years.

What is 13.8 billion years?

100

Using one's own gut feeling or internal belief to evaluate a statement.

What is Intuition?

200

These are formed by the death of stars, creating heavier elements

What are stars/new chemical elements?

200

The technique of zooming in and out on historical events to see the big picture or tiny details.

What is Scale Switching?

200

Trusting a source, such as a teacher or textbook, to provide accurate information.

What is Authority?

300

The sixth threshold, which occurred roughly 10,000 to 11,000 years ago, allowed humans to settle down.

 What is Agriculture?

300

The number of years it would take for a human to count to one billion, one number per second.

What is 32 years?

300

Using a formal, structured argument to check if a claim makes sense

What is Logic?

400

The threshold that involved the harnessing of fossil fuels and the beginning of rapid, exponential change.

What is the Modern Revolution?

400

The "unit" of time that makes up the vast majority of the universe's 13.8 billion-year existence.

What is cosmic time / cosmic scale?

400

Relying on tangible proof, such as fossils or data

What is Evidence?

500

The fundamental concept describing how the universe becomes more structured, requiring specific "Goldilocks Conditions".

What is Increasing Complexity?

500

The concept that explains how the Earth and humanity are a tiny, recent part of a much larger story.

What is Cosmic Calendar/Perspective?

500

The Four Claim Testers, used to evaluate these, which are statements that may or may not be true.

What are Claims?