Where did the Declaration's ideas come from? Trace them to Enlightenment philosophy — natural rights and the social contract — and see how Jefferson adapted them. Crack all four locks by reasoning from the sources.
The Declaration's most famous lines didn't appear from nowhere. They drew on Enlightenment thinkers — especially John Locke — on natural rights and government by consent. Open the source excerpts, then solve the locks. Rigorous analysis means tracing ideas to evidence, and noting what Jefferson kept, changed, or left out.
Tap each clue to read it. (You can reopen them anytime.)
Solve each lock using the clues above.
You traced the Declaration's ideas to their Enlightenment sources and distinguished influence from invention. That's the work of intellectual history.