While no single "oldest puzzle" can be definitively identified, the historical record points clearly to one inventor and purpose:
| Era | Development |
|---|---|
| 1760s-1800s | "Dissected Maps" — educational, geographic, non-interlocking, push-fit |
| Early 1800s | Subjects expand: history, botany, Bible scenes, alphabet |
| 1840s | Treadle fretsaw enables tighter curves, interlocking "whimsy" pieces |
| 1880s | Plywood replaces mahogany — cheaper, mass production begins |
| 1900s | Die-cut cardboard — "jigsaw" name sticks (though fretsaw used earlier) |
| 1930s | Great Depression boom — cheap entertainment, weekly series, advertising premiums |
| Modern | Laser-cut wood, 3D, AR-enhanced, custom photo puzzles |
Bottom line: John Spilsbury's 1760s dissected maps are universally recognized as the direct ancestors of modern jigsaw puzzles. The first was almost certainly a map of Europe, cut along political boundaries for geography lessons.