Reading Timelines

The timeline shows how frameworks in a field have evolved. When they emerged, how long they lasted, when competitors showed up.

Frameworks appear as horizontal bars across time. Their position shows when they existed. You'll notice they tend to go through phases: appearing when ideas first gain traction, holding steady during periods of dominance, then fading or ending when successors take over.

Try This

1. Open a timeline (try Classical Mechanics)
2. Click any bar to select that framework
3. Look at the details panel that appears
4. Notice which frameworks overlap in time (competitors) vs. which hand off to successors

Visual Elements

Bar Opacity

Bar transparency tells you how certain we are about the dates:

• Solid bars: Well-documented dates
• Slightly faded: Narrow uncertainty (within a decade)
• More transparent: Broader uncertainty (dates are approximate)

Time Gaps

Some fields have ancient origins followed by long stretches of dormancy. When there's a gap of 150+ years with no activity, the timeline collapses that empty space. You'll see a zigzag break line with a striped background showing where time was skipped.

This keeps both ancient and modern eras readable. A field like Architectural Theory might show Vitruvius (30 BCE) on the left, a collapsed gap showing "1500y", then the modern frameworks on the right.

Mobile View

On smaller screens, the timeline switches to a card layout. Each framework shows up as a tappable card with the name, date range, and a mini timeline bar showing its position relative to the full history.

What the Timeline Shows

Not every framework follows the same arc. Some emerge and dominate for centuries. Others flash briefly and vanish. A few get revived generations later when intellectual fashion shifts.

The timeline captures relationships through positioning. When two frameworks compete for the same territory, you'll see them running in parallel. When one clearly replaces another, there's usually a visible handoff. And sometimes frameworks merge into something new.

Zooming

Use the "Start from" slider to zoom into a specific era. As you adjust it:

• Frameworks that ended before the selected year are filtered out
• The remaining frameworks smoothly expand to fill the available space
• The timeline shows how many frameworks "ended before" your selected date

The slider uses a non-linear scale that gives more control over recent years. Most of the range covers the modern era where frameworks are densest, while ancient periods are compressed. You get fine-grained control when exploring the last few centuries, which is usually where most of the action is.

What If Nothing Appears?

Some subfields are still being populated. If you see an empty or sparse timeline, the content is still being generated. Try a different subfield, or check back later.

Patterns to Look For

When you're reading a timeline, try to spot patterns. Does this field tend to build incrementally, or does each new framework reject its predecessors? What was happening in the world when major transitions occurred? Big intellectual shifts often line up with political, technological, or social changes.

Next Steps

Now that you can read timelines, see how to explore the Framework Graph to trace connections between ideas.

Try it now: Explore Literary Theory or Evolutionary Biology